Cook & Peary North Pole Expeditions: Kawin (Chicago) postcards No.30 (Traveling Northward by Sledge train), No.32One of the White Bears killed while attacking the explorers), No.33 (Ice hummocks in pathless waste), No.34 (Icebergs off of Greenland), No.36 (A Polar camp.), No.37 (Hauling in a walrus), No.38 (Aluminum sledge used by Dr. Cook for final dash.) & No.39 (Map showing routes taken by Cook and Peary). (8)