The following two days I still kept to the plain, on the first day finding plenty of water, and camping near a mud-trough where the water was flowing west; but on the second day we wandered into a waterless wilderness, and taking a north-west course marched for hours before we reached a stream. Our sufferings were intolerable, increased as they were by the salt nature of the water which we had been drinking for days. Half the boys fell by the road, and lay helpless till relieved by the water I sent back. I was beginning to despair of saving them, when from the only ant-hill for miles I saw a flight of birds, and after an hour’s sharp burst I arrived at a large vlei, where to my joy I found that the water was flowing north, and was less salt. At an early stage of that day’s march I had to leave yet another load. Soon after starting I saw a herd of at least four hundred hartebeeste, and on the vlei, where we camped, the numbers of ducks, geese, and pelicans were extraordinary. At my first shot I killed two large spurwings, and a few more rounds provided geese for all the camp, while I revelled in the luxury of _pâté de foie maigre_; but the little plump teal, knowing that I had no shot-gun, kept flighting backwards and forwards in thousands. Two guns might have had an evening’s sport that they would have remembered for a lifetime. A few miles from camp I met some Nuer who had come to meet me. The chief, who was very sociable, though, like all, an incorrigible beggar, had been to Fashoda in the old times, and again my classic Arabic came into play. He asked after Emin, and seemed surprised to hear of his death, and also after Wadelai and Lado, and was particularly anxious to know if there was still a zariba at Bohr. He laid great stress on this point, asking me over and over again, so I imagined he wished to verify reports he had received of the flight of the Dervishes. The following day I marched to the junction of the Kohr with the Bahr-el-Zaraf. In Justus Perthe’s old map it is suggested that this Kohr is the outlet of the streams crossed by Lupton Bey in the hills east of Gondokoro. This cannot be so, as the natives at Bohr assured me that there was no water many days east; and if these streams are the feeders of this Kohr, they must, by the contour of the country, pass close to Bohr. Nor could the channel be dry, as the Kohr held plenty of water. Hence I am inclined to think that Lupton’s streams either flow into the Nile south of Bohr, or pass down the other side of the watershed into the Pibro, the largest tributary of the Sobat. As Lupton went overland from Gondokoro to Bohr, and does not mark any significant feeder of the Nile, it is probable that the latter hypothesis is correct. That is, that they flow into the vast marsh recently located as the headwaters of the Pibro. If this is correct, the Kohr must also drain out of the Pibro marsh, in which case the country between the Sobat and the Bahr-el-Zaraf is an island.