A new expedition, under Marine-Lieutenant Chariton Laptev, sailed along the same coast in 1739. The Lena was left on the 1st August, and Cape Thaddeus (76° 47' N.L.) reached on the 2nd September, the navigation having been obstructed by drift ice only off Chatanga Bay. Cape Thaddeus is situated only fifty or sixty English miles from Cape Chelyuskin. They turned here, partly on account of the masses of drift ice which barred the way, partly on account of the late season of the year, and wintered at the head of Chatanga Bay, which was reached on the 8th September. Next year Laptev attempted to return along the coast to the Lena, but his vessel was nipped by drift ice off the mouth of the Olonek. After many difficulties and dangers, all the men succeeded in reaching safely the winter quarters of the former year. Both from this point and from the Yenisej, Laptev himself and his second in command, Chelyuskin, and the surveyor, Tschekin, the following year made a number of sledge journeys, in order to survey the peninsula which projects farthest to the north-west from the mainland of Asia.
With this ended the voyages west of the Lena. The northernmost point of Asia, which was reached from land in 1742 by Chelyuskin, one of the most energetic members of most of the expeditions which we have enumerated, could not be reached by sea, and still less had any one succeeded in forcing his way with a vessel from the Lena to the Yenisej. Prontschischev had, however, turned on the 1st September, 1736, only some few minutes, and Laptev on the 2nd September, 1739, only about 50' from the point named, after voyages in vessels, which clearly were altogether unsuitable for the purpose in view. Among the difficulties and obstacles which were met with during these voyages, not only ice, but also unfavourable and stormy winds played a prominent part. From fear of not being able to reach any winter station visited by natives, the explorers often turned at that season of the year when the Polar Sea is most open. With proper allowance for these circumstances, we may safely affirm that no serious obstacles to sailing round Cape Chelyuskin would probably have been met with in the years named, by any steamer properly fitted out for sailing among ice.