Before we came to the junction of the Leeba and Leeambye we found the banks twenty feet high, and composed of marly sandstone. They are covered with trees, and the left bank has the tsetse and elephants. I suspect the fly has some connection with this animal, and the Portuguese in the district of Tete must think so too, for they call it the 'Musca da elephant' (the elephant fly). The water of inundation covers even these lofty banks, but does not stand long upon them; hence the crop of trees. Where it remains for any length of time, trees can not live. On the right bank, or that in which the Loeti flows, there is an extensive flat country called Manga, which, though covered with grass, is destitute in a great measure of trees. Flocks of green pigeons rose from the trees as we passed along the banks, and the notes of many birds told that we were now among strangers of the feathered tribe. The beautiful trogon, with bright scarlet breast and black back, uttered a most peculiar note, similar to that we read of as having once been emitted by Memnon, and likened to the tuning of a lyre. The boatmen answered it by calling "Nama, nama!"--meat, meat--as if they thought that a repetition of the note would be a good omen for our success in hunting. Many more interesting birds were met; but I could make no collection, as I was proceeding on the plan of having as little luggage as possible, so as not to excite the cupidity of those through whose country we intended to pass. Vast shoals of fish come down the Leeambye with the rising waters, as we observed they also do in the Zouga. They are probably induced to make this migration by the increased rapidity of the current dislodging them from their old pasture-grounds higher up the river. Insects constitute but a small portion of the food of many fish. Fine vegetable matter, like slender mosses, growing on the bottom, is devoured greedily; and as the fishes are dislodged from the main stream by the force of the current, and find abundant pasture on the flooded plains, the whole community becomes disturbed and wanders. The mosala ('Clarias Capensis' and 'Glanis siluris'), the mullet ('Mugil Africanus'), and other fishes, spread over the Barotse valley in such numbers that when the waters retire all the people are employed in cutting them up and drying them in the sun. The supply exceeds the demand, and the land in numerous places is said to emit a most offensive smell. Wherever you see the Zambesi in the centre of the country, it is remarkable for the abundance of animal life in and upon its waters, and on the adjacent banks.