Above that point there is no navigation except by the native rafts (kellek), which descend the river and are broken up on arrival at their point of destination.
Equally ancient are the rafts called kellek, constructed of inflated goat-skins, covered with a framework of wood, often supporting a small house for passengers, which descend the Tigris from above Diarbekr.
Steamers ascend this river as far as Bilyutai, near the Mongolian frontier, and bring back tea, imported via Kiakhta, while grain, cedar nuts, salt, soda, wool and timber are shipped on rafts down the Khilok, Chikoi and Uda (tributaries of the Selenga), and manufactured goods are taken up the river for export to China.
Light boats and rafts are floated at all points, and steamers ply on its lower portion; its estuary has important fisheries.
From Jalalabad downwards the river is navigable by boats or rafts of inflated skins, and is considerably used for purposes of commerce.
Canoes of bent bark, for the inland waters, are hastily prepared at need; but the inlets and straits of the north-eastern sea-coast are navigated by larger canoes and rafts of a better construction.
Above Agram the Save is used chiefly for floating rafts of timber; east of Sissek it is navigable by small steamboats, but, despite its great volume, the multitude of its perpetually shifting sandbanks interferes greatly with traffic. Steamers also ply on the Una, the Drave below Barcs, and the Danube.
According to the scouts the last of them crossed on rafts during the night.
When at last they were driven to the Strait they would drift over on rafts or in clumsy shallops; being thereafter left in peace to concentrate their race, then possibly only in an approximately pure state, in the island to which the Dravidians would not take the trouble to follow them, and where they would have centuries in which once more to fix their racial type and emphasize over again those differences, perhaps temporarily marred by crossing, which were found to exist on the arrival of the Whites.
Its rapid current does not permit of extensive navigation, but timber rafts are floated down from above Innsbruck.