The principal field of Baron Toll’s Arctic investigations lay among the islands of the Siberian Ocean, whither, from the year 1885 onwards, he conducted a series of brilliantly successful expeditions, all of which added greatly to the world’s knowledge of the geology, meteorology, botany, and palæontology of these unexplored lands. He started out on his last journey on July 22, 1900, in the splendidly equipped laboratory ship _Sarya_, which was provisioned for four years, with the object of continuing the work by which his name had already become famous. The first winter was spent at Taimur, at the mouth of the Khatanga, and in the following summer he rounded Cape Chelyuskin, paid a visit to Bennett Island, and was ultimately frozen into Nerpchya Bay, where he met an auxiliary expedition sent out under Volossovich. On June 20 he set out with the astronomer, F. G. Seeberg, and two hunters on a journey of exploration. From a record subsequently found on Bennett Island by Lieutenant Kolchak, we know that the party followed the north coast of Kotelnyi and Thadeef Islands, keeping their course towards New Siberia. Here the ice broke up, and, taking to their boats, they reached Bennett Island on August 26. The record ends with these words: “To-day we are going southwards. We have provisions for 14 to 20 days. All in good health.” That is all we shall ever know of the fate of Baron Toll and his companions. M. Brusneff is of opinion that they must have perished on their way across from Bennett Island to New Siberia. Before they could have reached the end of that journey the weather was becoming cold and ice must have been forming upon the sea, making it impossible for them to cross it in their boats. They had only provisions for a fortnight or three weeks, and little prospect of adding to their supplies, while, to make matters worse, they had no warm clothing with them. It is to be feared that the latest victims claimed by the Arctic regions must have suffered severely before death brought them release from their troubles and robbed the world of two of its ablest and most enthusiastic men of science. So ends the story of Arctic exploration up to the present time. Those who have read these pages cannot fail to have been impressed by the gallantry with which generations of brave men have willingly faced, in the cause of science, the terrible privations and sufferings only to be met with in the frozen North, or to have felt proud of the part which Great Britain has played in solving the secrets of the Polar regions. Yet, dangerous though the service unquestionably is, it is a fact that at no time in the whole of its history has the death-rate among those engaged in it exceeded the average death-rate of the navy, while so immense has been the advance made in the science of Arctic travel during recent years that the risks attending it have now been reduced to a minimum.