It was, indeed, a time of sore trouble. To find the servant dead in the camp kitchen; to catch a hurried glimpse of blanketed shapes hustled quickly to the desert on a stretcher; to hold the lantern over the grave into which a friend or comrade--alive and well six hours before--was hastily lowered, even though it was still night; and through it all to work incessantly at pressure in the solid, roaring heat, with a mind ever on the watch for the earliest of the fatal symptoms and a thirst that could only be quenched by drinking of the deadly and contaminated Nile: all these things combined to produce an experience which those who endured are unwilling to remember, but unlikely to forget. One by one some of the best of the field army and the communication Staff were stricken down. Gallant Fenwick, of whom they used to say that he was 'twice a V.C. without a gazette'; Polwhele, the railway subaltern, whose strange knowledge of the Egyptian soldiers had won their stranger love; Trask, an heroic doctor, indifferent alike to pestilence or bullets; Mr. Vallom, the chief superintendent of engines at Halfa; Farmer, a young officer already on his fourth campaign; Mr. Nicholson, the London engineer; long, quaint, kind-hearted 'Roddy' Owen--all filled graves in Halfa cemetery or at the foot of Firket mountain. At length the epidemic was stamped out, and by the middle of August it had practically ceased to be a serious danger. But the necessity of enforcing quarantine and other precautions had hampered movement up and down the line of communications, and so delayed the progress of the preparations for an advance. Other unexpected hindrances arose. Sir H. Kitchener had clearly recognised that the railway, equipped as it then was, would be at the best a doubtful means for the continual supply of a large force many miles ahead of it. He therefore organised an auxiliary boat service and passed gyassas and nuggurs [native sailing craft] freely up the Second Cataract. During the summer months, in the Soudan, a strong north wind prevails, which not only drives the sailing-boats up against the stream--sometimes at the rate of twenty miles a day--but also gratefully cools the air. This year, for forty consecutive days, at the critical period of the campaign, the wind blew hot and adverse from the south. The whole auxiliary boat service was thus practically arrested. But in spite of these aggravating obstacles the preparations for the advance were forced onwards, and it soon became necessary for the gunboats and steamers to be brought on to the upper reach of the river.