The 24th of June, 1861, was a memorable day. Although this was actually the beginning of my work, I felt that by the experience of this night I had obtained a clew to one portion of the Nile mystery, and that, as "coming events cast their shadows before," this sudden creation of a river was but the shadow of the great cause. The rains were pouring in Abyssinia! THESE WERE SOURCES OF THE NILE! The journey along the margin of the Atbara was similar to the route from Berber, through a vast desert, with a narrow band of trees that marked the course of the river. The only change was the magical growth of the leaves, which burst hourly from the swollen buds of the mimosas. This could be accounted for by the sudden arrival of the river, as the water percolated rapidly through the sand and nourished the famishing roots. At Gozerajup, two hundred and forty-six miles from Berber, our route was changed. We had hitherto followed the course of the Atbara, but we were now to leave that river on our right, while we travelled about ninety miles south-east to Cassala, the capital of the Taka country, on the confines of Abyssinia, and the great depot for Egyptian troops. The entire country from Gozerajup to Cassala is a dead flat, upon which there is not one tree sufficiently large to shade a full-sized tent. There is no real timber in the country; but the vast level extent of soil is a series of open plains and low bush of thorny mimosa. There is no drainage upon this perfect level; thus, during the rainy season, the soakage actually melts the soil, and forms deep holes throughout the country, which then becomes an impenetrable slough, bearing grass and jungle. No sooner had we arrived in the flooded country than my wife was seized with a sudden and severe fever, which necessitated a halt upon the march, as she could no longer sit upon her camel. In the evening several hundreds of Arabs arrived and encamped around our fire. It was shortly after sunset, and it was interesting to watch the extreme rapidity with which these swarthy sons of the desert pitched their camp. A hundred fires were quickly blazing; the women prepared the food, and children sat in clusters around the blaze, as all were wet from paddling through the puddled ground from which they were retreating.