Read Ebook: The binding of the Nile and the new Soudan by Peel Sidney Cornwallis

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In the Fayoum, where, owing to the difference in the levels, the canals have often a very high velocity, there are very ingenious water-wheels or turbines, which play the part of sakiehs, but are turned by the force of the current; the water thus lifts itself continuously.

Where the lift is very little, shadoofs and sakiehs are replaced by instruments called Natalis and Archimedean screws; but, naturally, since the introduction of perennial irrigation has so increased the area to be watered by lift, machinery has had to be called in, and most of the work is done by pumps worked by steam. Each large land-owner has his own pump and engine, which can be moved from place to place, and are also hired out to the smaller men. On very large estates stationary engines have been erected, which, of course, are able to raise a much larger amount of water; but as a rule the machinery employed is a portable eight-horse-power engine and an eight-inch centrifugal pump.

How different is all this from the lot of the agriculturist in other lands! For him there is no digging or maintenance of canals; no apparatus of regulators, dams, sluice-gates, siphons, and drains; no painful lifting of the water by pumps and engines, shadoofs, and sakiehs. The rain falls upon his fields from heaven without any effort of his. He looks to Providence to regulate his supply; the Egyptian looks to a Government department. But the Egyptian, as a compensation for his extra labour, has the advantage of greater certainty. He knows the sun will shine. The rise and fall of the Nile, variable as it is, can be foretold with greater exactness than that of any other river--with far greater exactness than the duration of the rainy season in any country in the world. Nature indeed made his task simple in the extreme, if he had been content with one crop a year. Every year the flood thoroughly washed the land, and kept it free from injurious salts; it also covered them with a deposit of mud, which relieved him from the necessity of dressing and manuring the exhausted soil. The Nile silt, though singularly rich in potash, the principal food of leguminous plants, like peas, beans, and clover, is, however, very poor in the nitrates on which cereals depend. But the Egyptian clover, called bersine, has the property of secreting nitrates from the air, and depositing them in the soil to an extraordinary extent, so that the land was able to bear crops of clover and cereals in rotation to an unlimited extent without any manuring. The desire to grow rich by crops like cotton and sugar, and by forcing the land to double its output, has changed all this. Not only has the summer supply of water become of the utmost importance, but the soil has to be constantly refreshed with manures. The question of manures is, indeed, only second, under perennial irrigation, to the question of water.

Wherever cattle and stock are numerous, farmyard manure is used, as well as the guano from the immense colonies of pigeons, kept for the purpose in specially built pigeon-lofts throughout Egypt. Between Halfa and Kena there are inexhaustive supplies of nitrates in the desert, and north of Kena the mounds which mark the sites of ancient cities, like Abydos, Ashmun?n, Medinet, and the rest, serve the same purpose. The ruins of the past are thus valued by the agriculturist not less than by the archaeologist, perhaps even more so; for lands in proximity to them are rented higher in consequence. Year by year more attention is now paid to the dressing of the soil, as perennial irrigation is more understood and more studied; besides the natural resources of the country, an increasing amount of manures is imported from abroad, and there is little doubt that the growing tendency in this direction will continue.

But all preparation of the soil is worse than useless labour unless the necessary amount of water can be provided. This amount varies both with the nature of the crop, the season of the year, and the position of the land. The critical time is, of course, the summer, when the supply of water is least and the heat is greatest, and, of course, in Upper Egypt, where the sun is strongest, and the loss by evaporation consequently greater, the demand is more urgent than in the Delta.

The total amount of cultivable land in Egypt is 6,250,000 acres. Before the completion of the new works, to which period all the figures in this chapter refer, the total nominally under cultivation was about 5,750,000 acres. Of this, Upper Egypt claimed 2,320,000--viz., 587,000 nominally under perennial irrigation, and 1,732,000, including 1,435,000 under basin irrigation every year, and 297,000 of Nile berms, which are only flooded once in six or seven years, and at other times irrigated directly from the Nile by means of shadoofs and water-wheels. Of the whole of this area only about 20 to 30 per cent. produce double crops in the year; for the amount of perennial irrigation is but small, and, although the whole of the Fayoum--329,000 acres--was supposed to be perennially irrigated, so faulty was the water-supply that the summer crops were only about 30 per cent. of the whole, instead of 50 per cent., which is the rule in the Delta. It seems, indeed, as though matters had been arranged expressly for the benefit of the tourist; it is Upper Egypt in the winter season that he goes to see, and it is then that the fields are green with corn, clover, and other crops. The following table shows the different crops, and the acreage devoted to them at the different seasons in Upper Egypt:

Summer 372,500 Sugar, cotton, vegetables, melons, summer sorghum .

Flood 530,000 Flood sorghum, rice.

Winter 2,120,000 Wheat, beans, clover, barley, lentils, flax , onions, vetches.

In Lower Egypt, or the Delta, the total area of fully or partly cultivated land is 3,430,000 acres, and there are still 500,000 acres of totally unreclaimed land. All this is under perennial irrigation; half of it is under summer crops every year, and 40 per cent. produces two crops a year. The following is a similar table to that given for Upper Egypt:

LOWER EGYPT.

Summer 1,674,000 Cotton, sugar, vegetables, rice.

Flood 980,000 Maize , rice.

Winter 2,139,000 Wheat, barley, clover, beans, vegetables, flax.

Even if we look only to the summer acreage under crops, it is obvious that the water-supply in the summer is very important; but when we look to the value of the crop it becomes much more striking. Far the most valuable crop in Egypt is the cotton, which is the principal item in the summer. In Upper Egypt the value of a summer crop is, on the average, more than twice that of a winter crop per acre, and in the Delta the proportion is nearly the same. And though the value of the flood crops is increased by the date-palms, of which there are 5,700,000 paying taxes in Egypt, and whose produce is gathered at this season, it cannot be compared with the summer crops. Sugar-cane is now but little grown in the Delta, and even in Upper Egypt its acreage is rather less than that of cotton.

Valuable as are the cotton-plant and the sugar-cane, it must never be forgotten that one of the humbler winter crops, though valued much lower in point of money, is yet the foundation of well-being in the others--I mean the Egyptian clover, or bersine, the friend of beast and man alike. Long before I knew its remarkable properties, I admired it for its beauty. Green and glossy, it covers acre upon acre with a luxuriant carpet, in pleasing contrast both to the black soil and the desert sand, and most refreshing and comforting to the eye. A bundle of it will satisfy even the grumbling camel; even the melancholy buffalo looks a shade less depressed when her turn comes to be tethered in it for her meal. Sheep and donkeys can hardly eat it down fast enough within the circle of their ropes before it has grown up again. And all the time it is steadily collecting in the soil the invaluable globules of nitrate, which will put new life into the succeeding cotton or corn. The part it plays in preparing the soil can be estimated by the rotations of crops followed by the Egyptian cultivator. These are as follows:

ON RICH SOILS.

First year Clover Cotton.

Second year Beans or wheat Indian corn.

ON POOR SOILS.

First year Clover Cotton.

Second year Clover Cotton.

Third year Barley Rice or fallow.

Rice and barley have their place, because they are less affected by the injurious salts, which are the great enemies of the soil's fertility.

In Lower Egypt cotton is sown from the end of February to the beginning of April. The land is well watered before it is ploughed for the seed, and again when the seed is sown. From then until the beginning of the flood it is watered on the average about once in twenty days. The harvest lasts from August 20 to November 10, and the cotton is picked two or three times over. During this time the crop is watered about once in every fifteen days, but as the water is now abundant there is nothing to fear. Indian corn is sown from July 5 to August 30, and October 15 to November 30 is the period of harvest. It is irrigated at the time of sowing, twenty days after, and then once in ten or twelve days. The first two of these waterings are, of course, the important ones. The earlier it is sown, the better the crop will be, because it will have better weather for maturing; but if the flood is late, and consequently the water-supply is low, the Government may have to resort to a system of rotations in sending water down the canals, and then the Indian corn crop may be sacrificed to the interests of the cotton. Rice is the wettest of all the crops; the kind sown in May and reaped in November is watered once in ten days before the flood, but during the flood is given as much water as the drains can carry off. The other kind is sown in August, and also reaped in November. Both in Lower and Upper Egypt it is purely a flood crop, and takes all the water it can get. The winter crops, wheat, beans, barley, and clover, are sown in November and December. Wheat and beans are irrigated twice, barley once, but clover goes on growing up till June, and takes more water according to the number of crops, sometimes three or four, that are taken off it.

In Upper Egypt cotton-sowing begins at the same time, but the harvest is earlier. Sugar-cane is sown in March, and the canes are cut from December 15 to March 15. Sometimes the same roots are left in the ground, and produce another crop in the second year; but this is never of such quality as the first, and the land has probably to be left fallow after it. Sugar, therefore, though nominally more valuable than cotton per acre, is more costly in the long-run. It is watered every twelve or fifteen days. The other crops are the summer and flood sorghum, grown on the berms or in tracts within the basins, and irrigated by shadoofs and water-wheels about once every ten days; and the wheat, beans, clover, and barley, in the basins. The cereals are usually not watered at all, but the clover follows the same course as in Lower Egypt.

Summing up these results, we find that the principal crops in Lower Egypt are cotton and rice. The cotton needs irrigation about once in twenty days, the rice once in ten days. To provide this amount of water, a canal should discharge 22 cubic metres in twenty-four hours per acre of cotton, and 40 cubic metres per acre of rice. That is to say, 1 cubic metre per second will suffice for 4,000 acres of cotton and 2,150 acres of rice. In Upper Egypt rice is only a flood crop, and cotton and sugar need about 25 to 30 per cent. more water than in the Delta, owing to the greater loss from evaporation--that is to say, 1 cubic metre per second will only suffice for 3,000 acres of cotton or sugar. During the winter the land throughout Egypt requires on the average a watering once in forty days. But, as we have seen, it is the summer supply for the cotton that is the really important thing. We shall see later what the effect of the reservoir is likely to be in safeguarding and extending these interests.

THE DELTA BARRAGE AND THE ENGLISH ENGINEERS

At the date of the English occupation the Delta Barrage was generally thought to be like the whole fabric of Egyptian Government, rotten to the core. And so indeed it seemed. No one had ever dared to use, or apparently even to think of using, the Barrage on the Damietta or right-hand branch at all. The history of the Barrage on the Rosetta branch was hardly less inglorious. In 1863 its gates were closed for the first time, but about ten of its arches began to settle, and ominous cracks showed. Eventually the threatened part was surrounded by a coffer-dam, and from 1872 to 1883 it managed to hold up about 1 metre. But even that was precarious. Commission after Commission had condemned the structure; it was felt that at any moment it might give way, especially if called upon to bear a greater strain, and it was actually the settled policy of the Government to rely on huge and costly pumping-stations instead. It was a paltry result after the expenditure of ?4,000,000 and so much labour.

Then, not for the first or last time, the Anglo-Indians came to the rescue of Africa. Sir Evelyn Baring himself during his service as Financial Member of the Council in India, must have been impressed by the enormous importance of irrigation. It would not be difficult to find many points of resemblance between his character and that of one of the greatest, if not the greatest, of the rulers of India, Lord Lawrence, different as were their spheres of work; but certainly they were alike in this. As Lord Lawrence supported Arthur Cotton in his engineering work, so Lord Cromer supported Colin Scott-Moncrieff and the band of trusty lieutenants--Willcocks, Garstin, Ross, Brown, Foster, Western, and Reid--who came with him. Fortunately for Egypt, these men, trained in the best school of irrigation in the world, possessed not only the highest scientific skill and knowledge, but were also animated by the best spirit of the empire-building Englishman. Deep in them lay the earnest wish and determination, far stronger even than their enthusiasm and love for their profession, to alleviate the lot of the unhappy peasantry of Egypt. It was this heartfelt sympathy for the wrongs of the fellaheen, ground down by the intolerable burden of the corv?e, that sustained them in their ceaseless labours and enabled them to pass successfully through those dark days, when the air was full of forebodings of failure and disaster, whose fulfilment would have pleased so many.

The Barrage is situated, as has been said, a little way back from the point of the Delta. It is really two Barrages, one on the left or Rosetta branch of the Nile, with sixty-one arches, 465 metres in length, and the other on the Damietta branch with seventy-one arches, 535 metres in length. Between the two runs a revetment wall across the intervening tongue of land, 1,000 metres in length. From a distance it resembles a bridge of rather fanciful design, with the arches set unusually close together, and, indeed, for a great part of its career the functions of a bridge were the only ones it performed. The tongue of land between has been converted into beautiful gardens, planted with shady trees and many shrubs and flowers, and even a greensward resembling grass. Altogether, it is one of the most delightful and beautiful spots in Egypt, besides being one of the most useful. Here is the starting-point of the great feeder canals which irrigate the Delta provinces. On the left, facing north, is the Rayah Behera, which supplies the province of Behera, to the left of the Rosetta branch. Between the two Barrages is the head of the Rayah Menoufia, the canal which feeds the two provinces of Menoufia and Gharbia, lying between the two arms of the river; while on the right is the Rayah Tewfiki, which, with its supplementary canals, Ismailia, Sharkia, and Basusia, supplies the three eastern provinces of the Delta, Kalyubia, Sharkia, and Dakalia. All these canals are navigable, as well as the branches of the river, and provided with locks for that purpose. These great waterways are free to all, and few of the results of British occupation are more appreciated in Egypt. Formerly all craft upon the Nile had to pay toll on passing under a bridge, which did nothing but hinder their progress, while those for whose convenience it was made passed without charge overhead.

A Barrage, as its name implies, is designed to completely bar the bed of the river, so as to enable it to feed the canals at a higher level than would otherwise be the case, and also to allow the flood to pass through it easily. It needs, therefore, a very solid foundation from bank to bank, on which the arches which hold the movable sluice-gates can be securely planted. Its construction is, therefore, a very different and much more difficult matter than merely throwing a bridge over the stream, even a bridge with several spans. The difficulty is all the greater when, as here, the bed of the river offers nothing more substantial than shifting sands to build upon. It was for this reason that Linant wished to build the Barrages at leisure in the dry, and then divert the river from its old channels, and lead it through when they were completed. But Mougel chose to build his in the existing bed of the river, thereby increasing the difficulties of actual construction, though from other points of view there was much to be said for this plan. At the site of the Rosetta Barrage the bed of the river was not of uniform depth; he therefore filled up the deepest part of the channel, which lay on the right, with loose stones, so as to bring it up to the level of the bottom on the left-hand side. No cement was used in laying down this barrier, but the Nile mud filled the interstices and made it water-tight; when finished, this barrier was 60 metres wide and 10 deep at the deepest part. On this and on the natural sand he built a platform 46 metres in width and 3?5 metres thick, composed of concrete overlaid with brick and stonework. On the platform he raised his arches and piers, all built of brick. Each of the openings for the sluice-gates, sixty-one in number, was 5 metres wide. Like an iceberg, that part of the Barrage which is visible above water is much less than the invisible part below. To further strengthen the structure and keep it in its place, a mass of rubble pitching or loose stones was thrown into the river on the downstream side. This talus was 3 to 16 metres in depth, and at one part extended 50 metres downstream in a kind of tongue, narrowing down to 2 metres. The Damietta Barrage was built on a similar plan, but its downstream talus was not so large. Unfortunately, the concrete used for the platform was inferior, chiefly owing to the fact that Mehemet Ali, growing impatient at the slow progress of the work, ordered a certain amount of material to be laid down every day, and laid down it had to be in defiance of all engineering requirements. The consequence was that, as soon as the Rosetta Barrage was subjected to strain, ten of the arches on the left-hand side, where the platform was laid down on sand only, settled and cracked. It was patched up by surrounding the injured arches with a coffer-dam; but the Damietta Barrage never even had its gates put in.

Such was the structure with which the English engineers had to deal. Even as it stands to-day, it cannot, of course, compare in magnitude with many works upon the Indian rivers; but as regards the difficulties to be overcome, it can compare with almost any in the world. It would have been far easier to rebuild the whole thing from the beginning, but at the time the necessary funds were not forthcoming. They had to take the old structure, with all its imperfections, and screw it up to work as it was. The country could not afford to cut off the summer water-supply of the Delta while the repairs were in progress. The cotton-crop had always to be thought of. And the period of the year during which the summer canals required to be supplied was the only period during which work could be done, for once the flood came down all operations were at an end. It is the glory of the English engineers that, working under these conditions and with untrained workmen, they succeeded in their task.

The Government was already paying many thousands a year to a company for pumping water out of the Rosetta branch into the canals during the summer, and the first thing Sir Colin Scott Moncrieff had to do on his arrival was to decide upon a scheme which had been prepared for erecting new pumping-stations at an initial expense of about three-quarters of a million, and involving an annual expenditure of at least another quarter of a million. So hopeless were the prospects of the Barrage assumed to be, that even this expenditure, with a doubtful result, was thought preferable to repairing it. Sir Colin's arrival was only in the nick of time. He determined to see what could be done with the resources at hand. The new pumping-station scheme was set aside, and Mr. Willcocks was put in charge of the Barrage.

There was much literature on the subject. During the last sixteen years nothing had been done, but much had been written, and more said. Commissions, expert and inexpert, had issued voluminous and condemnatory reports, and had even prepared expensive schemes of repair. Mr. Willcocks is an indefatigable reader, and could hardly have been encouraged thereby, till an examination of the structure itself showed that all the later reports had been drawn up without reference to facts. It had been observed that whenever the gates were let down there was very severe action of the water on the downstream side. The authors of the reports concluded that the foundations were honeycombed. It is characteristic of the Looking-glass days of Ismail that no one ever thought of trying to find out by actual observation whether there might not be some other cause. But Mr. Willcocks, looking for himself, found that this action of the water was caused, not by honeycombed foundations, but by open gratings which intervened between the bottom of the sluice-gates and the platform. They had been put down originally to keep the silt away from the bottom of the gates. Someone had fixed them so as to prevent the gates from being lowered to their full extent and then they had actually been forgotten. Measures were at once taken to close these gratings, and eventually to remove them altogether. 20,000 cubic metres of rubble pitching were added to the talus. The Damietta Barrage was likewise strengthened with various ingenious expedients, improvised to meet the demands of the moment. Sluice-gates were put in for the first time and gradually closed. Part of it was closed by a temporary stone dam. Eventually in the summer of 1884 2?2 metres of water were held up on the Rosetta branch, and 1 metre on the Damietta. Next year the same nursing process was continued. The coffer-dam round the weak arches was strengthened, the talus of rubble pitching below each Barrage was completed, and this year 3 metres were held up on the Rosetta branch and 1?6 on the Damietta. The effect was extraordinary. The acreage under summer cultivation was doubled, rising from 600,000 to 1,200,000 acres. Not only was the supply of water in the Delta canals greatly increased throughout the summer, but, as it was delivered at a higher level, there was a great saving of expense in lifting it on to the land. For the first time the Egyptians thoroughly realized that a new power had come amongst them.

The experiment had been successful, but temporary expedients could not last for ever. The more water held up, and the greater the area of the summer cultivation, the more necessary it became to insure the stability of the structure. A thorough repair would cost money. Fortunately, this was now forthcoming. Mr. Willcocks' success had settled the claim of the Barrage to a share in the famous Irrigation Million borrowed in 1885.

At the end of 1886 the work was begun, under the charge of Colonel Western and Mr. Reid, sent specially from India for the purpose. The operations were spread over four years. In the first year the left half of the Rosetta Barrage was taken in hand and finished before the flood, next year the right half. In 1889 and 1890 the Damietta Barrage was similarly taken in hand and finished. Each year the part to be repaired was enclosed by earthen dams, and the water pumped out so as to lay the foundations dry. The whole of the existing floor was raised, both on the upstream and downstream side, and it was also considerably lengthened. It was, in fact, enclosed in a new and reliable suit of armour. The dangers and anxieties of the work were incessant. The protecting dams were always liable to be breached. Spring after spring burst out through the treacherous bed of the river, and threatened the destruction of the year's work; and again and again each of them was successively stopped by a number of ingenious devices. There is no enemy so persistent and so insidious in its attacks as running water. It is always feeling for and finding out the weak spots. It never sleeps or slackens by day or by night. It can only be met successfully by a corresponding activity. While work was possible, it was carried on unceasingly by night as well as by day. Sometimes as many as 1,600 men worked through the night. The upper brickwork was generally sound, but new iron sluice-gates moving in special grooves were fitted throughout. The whole of the repairs cost ?465,000. It was money well laid out. Not only was the safety of the Barrage assured, but it was found possible to hold up yet another metre of water. The area of summer crops matured rose once more from 1,200,000 to 1,520,000.

It might have been thought that the work was now complete. Both in 1891 and 1892 all the water in the Nile was held up, and diverted into the canals. Not a drop reached the sea during the summer without having done duty. But the engineers were now looking forward to a time when the supply would be greatly increased. The idea of a reservoir had become an affair of practical politics. It was necessary to make assurance doubly sure. Accordingly, in 1896 a new experiment was tried--namely, stock-ramming with clay.

Certain arches in the Damietta Barrage were selected, and in them five-inch holes were bored right down through pier and platform alike. When the bore-holes were complete, they were lined with iron tubes. Clay was then forced through the tube by means of an iron rammer, and as much as could be made to spread out at the bottom of the hole was put in and rammed. As far as the clay went, the experiment was not an entire success; but the boring brought to light a condition of things in the very vitals of the Barrage which demanded drastic treatment, for the bore-holes proved the existence of large cavities in the original platform, and in some places there was free water communication between one bore-hole and another. Some piers in the Rosetta Barrage were therefore chosen for a similar experiment, but this time liquid Portland cement was used instead of clay, and the results were entirely satisfactory. Few discoveries have been of more signal service than the invention of Portland cement. It is not too much to say that it has revolutionized hydraulic engineering by the facilities it affords for constructing solid works in water. Its strength and resisting power is enormous, but its greatest quality is that it hardens and solidifies under the action of water, and, so far as is known, only goes on getting harder and harder with time. The borings in the Rosetta Barrage having revealed similar deficiencies to those in the Damietta, it was decided to apply to both a thorough dose of this invaluable and invigorating medicine.

In 1897 five holes were bored in each pier of the Rosetta Barrage , and into each was poured a quantity of liquid cement. The necessity for the treatment was proved by the fact that in some cases the cement travelled right through from the bore-hole in one pier and rose through the bore-hole in an adjoining pier till it reached the top. One pier actually swallowed 439 barrels of cement, while its neighbour took a lesser but still gigantic draught of 327 barrels. There was no doubt that the cement thoroughly explored and filled all the cavities existing in the foundations under the bridge. In all, 3,254 barrels were used in the Rosetta Barrage alone. In 1898 the grouting process, as it is called, was applied with equal success to the Damietta Barrage.

To use Sir Hanbury Brown's homely but expressive image, the process applied to the Barrage was exactly that followed by a cook who wishes to finish off a cold pie with its proper complement of jelly. The jelly is introduced into the pie in the form of warm gravy, which penetrates into and fills every recess of the succulent interior, and then solidifies as it cools.

And still the engineers were not satisfied. So treacherous is the river's bed that no possible safeguards seemed superfluous. It speaks volumes for the courage and skill of those who in 1885 held up 3 metres of water with the old unreformed Barrage, that in 1897, after the successful execution of such great and costly repairs, it was still thought advisable to undertake completely new works to assist in the task of holding up 4, or at the most 5, metres.

It is a principle in hydraulics, not easily understood at first by the layman, that the pressure upon a weir or barrage in a river depends entirely upon the difference in level between the water on the upstream and on the downstream side, and not on the mere volume of water in the river behind it. In December, 1897, the Caisse de la Dette voted ?530,000 for the construction of two subsidiary downstream weirs, with the object of relieving the pressure on the Barrage by raising the level of the water on the downstream side, thus dividing the head of water to be held up into two--in other words, by making two steps instead of one. Each weir was to consist of a core of rubble masonry set in cement, sunk well below the bed of the river, and protected up and down stream by a long slope of rough stone blocks or pitching. To make the masonry core thoroughly watertight, a mass of clay puddle was to be put on either side of it. The weirs were thus to be a solid dam, blocking the course of the stream up to such a height that the head of water on the Barrage, at that time amounting to 4 metres, would be reduced to 2?5 metres. The flood would pass freely over the top of the weirs. At the same time the sluice-gates of the existing Barrage were to be heightened, so as to permit the upstream level to be raised 1 metre more in June and July, so as to take full advantage of the rising flood and facilitate the early sowing of maize, a great point with the Egyptian cultivator.

The weirs were constructed not a moment too soon. It so happened that the summer supply of 1900 was lower than in any previous year of which records have been kept. In 1889 the river sank to a level of ?60 metre below zero on the Assouan gauge. In 1878 it fell to ?71 metre below zero, and this was the lowest known before the summer of 1900. But on three days in that year, May 15, 16, and 26, the river fell to a level of ?91 metre below zero. The position was aggravated by the extension of summer cultivation. The total extent of summer crops had risen still further to over 1,700,000 acres.

To save the valuable cotton crop was the earnest preoccupation of the Irrigation Department. They were able by the most strenuous efforts, not merely to save the crop, but so to treat it that it gave a yield which, only a few years before, would have been considered perfectly impossible even in a good year. But all their efforts would have been in vain had it not been possible, thanks to the new weirs, to raise the level of the water upstream of the Barrage to an extent which would have been exceedingly dangerous without their assistance, and so to take full advantage of the rising flood. The mere enumeration of the special measures which were put into force gives a very good idea of the difficult duties which devolve on those who control the water in Egypt:

The system of rotations, which was introduced from India, is that the land-owners are only allowed to pump water on to their lands at certain intervals. There are several advantages in this. The water is economized, and as it can thereby be kept at a lower level in the canals, there is less danger of the soil becoming deteriorated by excessive saturation. The pumps are allowed to work for a certain period, according to the district, and then an interval is prescribed, until the expiration of which they are not allowed to work again. In 1900 the pumps were allowed to work for a period of six days at a time, and at first twelve days was the interval until the next pumping. But as the summer wore on, and the river continued to fall, the interval was gradually extended to twenty-two days--a very severe measure indeed.

Could any government be more paternal than this--it might even be said, more despotic? But countries which depend on irrigation have a natural tendency towards despotism. When water is plentiful they may be as republican and democratic as you please; but when the crisis of scanty water comes they must have a strong hand over them, just as the Roman Republic had to have its Dictator in times of national peril. It speaks well for the good sense of the Egyptians, and it proves their implicit faith, built up by sixteen years' experience, in the English engineers, that even those stringent regulations were unhesitatingly obeyed, and that breaches of them were so rare as to be almost non-existent. They had their reward; for while 1878 is still remembered as a year of black disaster and distress, in 1900 the cotton crop amounted to no less than 5,250,000 kantars, and the maize crop, in spite of its late sowing, was also very good. Only the rice, a comparatively insignificant item, was sacrificed to its more important rivals. Thanks mainly to the good work done by the completed Barrage, neither the public nor the private finances of Egypt suffered the least shock from a year of unprecedented scarcity of water, even when this was coupled with most unseasonable cold and fogs in September, which considerably diminished the output of cotton. Lord Cromer had indeed good reason to write in 1901:

'Had it not been for the labours of the eminent hydraulic engineers, who for the last seventeen years have placed their services at the disposal of the Egyptian Government, the most skilful financial assistance would not have availed both to place the Egyptian Treasury in a position of assured solvency and to meet in any adequate degree the constant demands which are the necessary accompaniment of a policy of reform.'

Such are the outlines of the long history of the Barrage, designed by Frenchmen and brought to perfection by Englishmen. Both nations can share in the credit of the work, and it is pleasant to record once more the generous and graceful act by which the chief of the English engineers recognised and acknowledged the merits of his predecessor. Sir Colin Scott Moncrieff discovered Mougel Bey living in obscurity and oblivion, weighed down by poverty and neglect. It was owing to his intercession that the poor old man was rescued from want, and, by means of a pension granted by the Egyptian Government, enabled to spend his remaining days in comfort and honour. Both nations are entitled to be proud of this act of poetic justice, which added a lustre of its own to the glory of the completed Barrage.

THE CORV?E

From time immemorial the peasantry of Egypt have been liable to the corv?e in some form or other. In a country depending for its existence upon the proper maintenance of its dykes, it was only natural that the whole population should turn out to perform the necessary work. But a useful custom very easily degenerated into a galling slavery under Oriental despotism. Rulers with absolute power of life and death over their subjects, who regarded the land they ruled as their own personal property, could not be expected to make much distinction between works carried out for the general good and those designed merely for their own convenience and aggrandisement. The Pyramids and others of the mighty remains of ancient Egypt stand as monuments of the greatness of the Pharaohs, but no less of the miseries of countless generations under the system of forced labour, which is known in our time as the corv?e, a term applied sometimes to the forced labour itself, and sometimes to those who perform it.

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