Chapter 25—A Slave Caravan The storm of the previous night, by swelling the tributaries of the Coanza, had caused the main river to overflow its banks. The inundation had entirely changed the aspect of the country, transforming the plain into a lake, where the peaks of a number of ant-hills were the sole objects that emerged above the watery expanse. The Coanza, which is one of the principal rivers of Angola, falls into the Atlantic about a hundred miles from the spot at which the “Pilgrim” was stranded. The stream, which a few years later was crossed by Cameron on his way to Benguela, seems destined to become the chief highway of traffic between Angola and the interior; steamers already ply upon its lower waters, and probably ten years will not elapse before they perform regular service