In the Arctic Ocean, opposite the mouth of the Kolyma River, lies the group of Medvezhyi Islands, numbering six. The closest to the shore and the largest in size is Krestovyi or Krestovskii Island (also known as the First); then come four small islands without names, known only by numbers: the Second, Third, Fourth, and Fifth; and finally, the easternmost is Chetyryokhstolbovoy Island — also known as the Sixth. In the summer of 1912, the Medvezhyi Islands were visited by the Hydrographic Expedition of the Arctic Ocean, consisting of two icebreakers: "Taimyr" and "Vaigach." I, as the geologist of the expedition, managed to land and examine only one of these islands — Chetyryokhstolbovoy.