The book "Der Eskimo" was written by an explorer born in which year ?
Peter Freuchen Lorenz Peter Elfred Freuchen (February 2, 1886 – September 2, 1957) was a Danish explorer, author, journalist and anthropologist. He is notable for his role in Arctic exploration, especially the Thule Expeditions.
Joseph Rock Joseph Francis Charles Rock (1884 – 1962) was an Austrian-American explorer, geographer, linguist and botanist.