Our route lay by the always interesting Tsavo River. Along the banks everything within reach of its moisture is delightfully fresh and green. Palms and other trees, festooned with brilliant flowering creepers, flourish along its course; all kinds of monkeys chatter and jabber in the shade overhead as they swing themselves from branch to branch, while birds of the most gorgeous plumage flutter about, giving a very tropical aspect to the scene. On the other hand, if one is tempted to stray away from the river, be it only for a few yards, one comes immediately into the parched, thorny wilderness of stunted, leafless trees. Here the sun beats down pitilessly, and makes the nyika of the Tsavo valley almost intolerable. The river has its source at the foot of snow-crowned Kilima N'jaro, whence it flows for about eighty miles in a northerly direction until it joins the Athi River, about seven miles below Tsavo Station. From this point the united streams take the name of Sabaki and flow more or less eastwards until they reach the Indian Ocean at Malindi, some seventy miles north of Mombasa. A narrow and tortuous Masai warpath winds along its whole length, but although we followed this trail our journey was nevertheless a very slow one, owing to the overhanging branches and creepers, from which we had constantly to be disengaged. The march was full of interest, however, for it was not long before we came upon fresh tracks both of hippo and rhino. Every now and again, also, we caught glimpses of startled bush-buck and water-buck, while occasionally the sound of a splash in the water told of a wary crocodile. We had gone about half the distance to the Sabaki when we came upon an unexpected obstacle in the shape of a great ridge of barren, rugged rock, about a hundred feet high, which extended for about a mile or so on both banks of the river. The sides of this gorge went sheer down into the water, and were quite impossible to scale. I therefore determined to make a detour round it, but Mahina was confident that he could walk along in the river itself. I hinted mildly at the possibility of there being crocodiles under the rocky ledges. Mahina declared, however, that there was no danger, and making a bundle of his lower garments, he tied it to his back and stepped into the water. For a few minutes all went well. Then, in an instant, he was lifted right off his feet by the rush of the water and whirled away. The river took a sharp bend in this gorge, and he was round it and out of our sight in no time, the last glimpse we caught of him showing him vainly trying to catch hold of an overhanging branch. Although we at once made all the haste we could to get round the ridge of rocks, it took us nearly half an hour to do it. I had almost given up hope of ever seeing Mahina again, and was much relieved, therefore, when we reached the river-side once more, to find him safe and sound, and little the worse for his adventure. Luckily he had been dashed up