Cooking on the specially designed primus stove. From the left: Otto Neumann Knoph Sverdrup, Oluf Christian Dietrichson and Fridtjof Nansen. They are posing in the photographer's studio. Because he himself had taken all the photos during the Greenland Expedition, illustrations that showed Fridtjof Nansen in action had to be reconstructed. These were to be used in the book about the crossing of Greenland.