Toll paid a further visit to the island group in the spring of 1892, accompanied by one Cossack and three natives. He traveled over the ice in sleds drawn by dogs and reached the south coast of Great Lyakhovsky Island. Along the southern coast of this island he found well-preserved bones, ivory, peat, wood, and even a tree within high sea cliffs that expose Late Pleistocene sediments. These sediments are cemented by permafrost and have accumulated periodically over the last 200,000 years.