1868, “Route 20:London to Tiflis[…]”, inHandbook for Travellers in Russia, Poland, and Finland, 2nd edition, London: John Murray,page320:
The steamers of the Russian Steam Navigation Company ply between Constantinople andPoti. Travellers change at Batoum into a steamer which performs the service between that port andPoti, and which has a less draught of water to enable it to cross the bar of the river Rion.
