Hunting the Senze (_Aulacodus Swindernianus_), an animal the size of a large cat, but in shape more like a pig, was the chief business of men and boys as we passed the reedy banks and low islands. They set fire to a mass of reeds, and, armed with sticks, spears, bows and arrows, stand in groups guarding the outlets through which the seared Senze may run from the approaching flames. Dark dense volumes of impenetrable smoke now roll over on the lee side of the islet, and shroud the hunters. At times vast sheets of lurid flames bursting forth, roaring, crackling and exploding, leap wildly far above the tall reeds. Out rush the terrified animals, and amid the smoke are seen the excited hunters dancing about with frantic gesticulations, and hurling stick, spear, and arrow at their burned out victims. Kites hover over the smoke, ready to pounce on the mantis and locusts as they spring from the fire. Small crows and hundreds of swallows are on eager wing, darting into the smoke and out again, seizing fugitive flies. Scores of insects, in their haste to escape from the fire, jump into the river, and the active fish enjoy a rare feast. We returned to the "Pioneer" on the 9th of October, having been away one month. The ship's company had used distilled water, a condenser having been sent out from England; and there had not been a single case of sickness on board since we left, though there were so many cases of fever the few days she lay in the same spot last year. Our boat party drank the water of the river, and the three white sailors, who had never been in an African river before, had some slight attacks of fever. CHAPTER XII. Return to the Zambesi--Bishop Mackenzie's grave--Frightful scenes with crocodiles--Death of Mr. Thornton--African poisons--Recall of the Expedition. We put to sea on the 18th of October, and, again touching at Johanna, obtained a crew of Johanna men and some oxen, and sailed for the Zambesi; but our fuel failing before we reached it, and the wind being contrary, we ran into Quillimane for wood.