Ernest de Koven Leffingwell

Ernest de Koven Leffingwell (January 13, 1875 – January 27, 1971) was an arctic explorer, geologist and Spanish–American War veteran. During the period from 1906 to 1914, Leffingwell spent nine summers and six winters on the Arctic coast of Alaska, making 31 trips by dog sled or small boats.

Source: Wikipedia — Ernest de Koven Leffingwell (CC BY-SA 4.0)