Note 1 — Chapter XXV · YAKUTSK.

It is bounded on the north by the Arctic Ocean, on the west by the Yeneseisk, and on the east by the Sea-coast provinces; whilst on its south lie the three provinces of Irkutsk, Trans-Baikal, and the Amur. The northern and western portions of the province are flat, but towards the south and south-east are the Yablonoi and Stanovoi mountain ranges, continuations, in a north-easterly direction, of the mighty Altai chain. The great river of the province is the Lena, whose waters are drained from an area of 800,000 square miles. From the slopes on the western side of Baikal its upper portion runs in a north-easterly direction as far as Yakutsk, after which the Lower Lena runs due north to the Arctic Ocean. The total length of the river is about 2,500 miles, with a fall of 3,000 feet. East of the Lower Lena are the rivers Yana, Indigirka, and Kolima, all of which are navigable and of considerable size, though small by comparison with their gigantic sister.