In August the channel near Timbuktu is again navigable owing to rain in the southern highlands.
It is not until Kabara, the port of Timbuktu, is reached, a distance of 450 m.
The best known are Koroko, Kong and Bona, entrepots for the trade of the middle Niger, and Bontuku, on the caravan route to Sokoto and the meeting-place of the merchants from Kong and Timbuktu engaged in the kola-nut trade with Ashanti and the Gold Coast.
He started as, before from the Gambia, reached the Niger, sailed down the river past Timbuktu, and on the eve of the successful accomplishment of his undertaking lost his life during an attack on his boat by the natives at Bussa (Nov.
A still more important expedition was that of Lieutenant Hourst, who, starting from Timbuktu in January 1896, navigated the Niger from that point to its mouth, executing a careful survey of the river and the various obstructions to navigation.