During the great northern expeditions,[13] several attempts were also made to force a passage eastwards from the Lena. The first was under the command of Lieutenant Lassinius in 1735. He left the most easterly mouth-arm of the Lena on the 21st of August, and sailed 120 versts eastward, and there encountered drift ice which compelled him to seek a harbour at the coast. Here the winter was passed, with the unfortunate result, that the chief himself, and most of the fifty-two men belonging to the expedition, perished of scurvy.
The following year, 1736, there was sent out, in the same direction, a new expedition under Lieutenant Dmitri Laptev. With the vessel of Lassinius he attempted, in the middle of August, to sail eastward, but he soon fell in with a great deal of drift ice. So soon as the end of the month--the time when navigation ought properly to begin--he turned towards the Lena on account of ice.
In 1739 Laptev undertook his third voyage. He penetrated to the mouth of the Indigirka, which was frozen over on the 21st September, and wintered there. The following year the voyage was continued somewhat beyond the mouth of the Kolyma to Cape Great Baranov, where further advance was prevented by drift ice on the 26th September. After having returned to the Kolyma, and wintered at Nischni Kolymsk, he attempted, the following year, again to make his way eastwards in some large boats built during winter, but, on account of fog, contrary winds, and ice, without success. In judging of the results these voyages yielded, we must take into consideration the utterly unsuitable vessels in which they were undertaken--at first in a double sloop, built at Yakoutsk, in 1735, afterwards in two large boats built at Nischni Kolymsk. If we may judge of the nature of these craft from those now used on the Siberian rivers, we ought rather to be surprised that any of them could venture out on a real sea, than consider the unsuccessful voyages just described as proofs that there is no probability of being able to force a passage here with a vessel of modern build, and provided with steam power.
It remains, finally, for me to give an account of the attempts that have been made to penetrate westward from Behring's Straits.