In central Celebes, the Kodina flows into Lake Posso, and the Kalaena discharges to the Gulf of Boni; the Posso, navigable by blottos (canoes formed of hollowed tree-trunks), is the only river flowing from the lake to the Gulf of Tomini.
Few of them therefore are of much service for navigation, except for the light-draught native canoes; and all of them are more or less closed at their outlets by sand-bars.
Where other means are not available, goods are carried by canoes, or on the shoulders of bearers along the native footpaths.
Their canoes, sometimes more than 1 00 ft.
The Papuans build excellent canoes and other boats, and in some districts there are professional boat-builders of great skill, the best craft coming from East Cape and the Louisiades.