The completion of one programme by the construction of the Reservoir and the works dependent upon it does not mean stagnation. Irrigation is an ever-growing and ever-living science. There can be no standing still. Even in the ordinary routine there are thousands of details always pressing forward for fresh consideration. It takes but a few years for a daring innovation to become old-fashioned. The system of perennial irrigation in Egypt is so young that there is still much to be learnt. It means a totally new style of agriculture. Nothing but constant experiment and constant watchfulness will enable the engineers to distribute the water to the best advantage. The best methods of reclaiming new land, and of preventing the deterioration of the old, the maintenance and improvement of existing locks, weirs, regulators, barrages, and other masonry, the care of canals and drains—these and an infinity of other matters fill the life of the irrigation engineer, so that, always interesting, it is also at times even exciting. Decisions of great and immediate importance have to be constantly and promptly taken. Their duty touches very nearly the lives of all who dwell and labour within their districts. There can be no question of any folding of the hands to slumber. But beyond all this, it is the peculiar good fortune of those whose care is the water-supply of Egypt that they have to travel in thought or in fact over half a great continent, and discuss schemes of a magnitude and extent enough to stagger the imagination of the boldest dreamer. The Anglo-Egyptian army at Omdurman opened an entirely new chapter in the history of the control of the Nile.