[Sidenote: Voyage of Prontshistsheff from the Lena towards the Yenisèi.] July, 1735, lieutenant Prontshistsheff sailed from Yakutsk up the Lena to its mouth, in order to pass from thence by sea to the Yenisèi. The Western mouths of the Lena were so choaked up with ice, that he was obliged to pass through the most Easterly one; and was prevented by contrary winds from getting out until the 13th of August. Having steered North West along the islands which lie scattered before the mouths of the Lena, he found himself in lat. 70° 4´. He saw much ice to the North and North East; and observed ice-mountains from twenty-four to sixty feet in height. He steered betwixt the ice, which in no place left a free channel of greater breadth than an hundred or two hundred yards. The vessel being much damaged, on the 1st of September he ran up the mouth of the Olenek, which, according to his estimation, lies in 72° 30´, near which place he passed the winter[165].
[Footnote 165: Gmelin Reise, II. 425 to 427.]
He got out of the Olenek the beginning of August in the following year; and arrived on the third at the mouth of the Anabara, which he found to lie in lat. 73° 1´. There he continued until the 10th, while some of the crew went up the country in search of some mines. On the 10th he proceeded on his voyage: before he reached the mouth of the Chatanga he was so entirely surrounded and hemmed in with ice, that it was not without great difficulty and danger he was able to get loose. He then observed a large field of ice stretching into the sea, on which account he was obliged to continue near the shore, and to run up the Chatanga. The mouth of this river was in lat 74° 9´. From thence he bent his course mostly Northward along the shore, until he reached the mouth of the Taimura on the 18th. He then proceeded further, and followed the coast towards the Piasida. Near the shore were several small islands, between which and the land the ice was immovably fixed. He then directed his course toward the sea, in order to pass round the chain of islands. At first he found the sea more free to the North of the islands, while he observed much ice lying between them. He came at length to the last island, situated in lat. 77° 25´. Between this island and the shore, as well as on the other side of the island which lay most to the North, the ice was firm and immovable. [Sidenote: Prevented by a Chain of Islands and the Ice from getting to the Yenisèi] He attempted however to steer still more to the North; and having advanced about six miles, he was prevented by a thick fog from proceeding: this fog being dispersed, he saw on each side, and before him, nothing but ice; that towards the sea was not fixed; but the accumulated masses were all so close, that the smallest vessel could not have worked its way through. Still attempting however to pass to the North; he was forced by the ice N. E. Apprehensive of being hemmed in, he returned to the Taimura; and from thence got, with much difficulty and danger, to the Olenek, on the 29th of August.