Dog sledges used during the winter. The «tents» in the background are «tundra frigates», Siberian vehicles which were put on top of sledges and pulled by reindeer (caribou). One of the pictures from the journey to Siberia between Aug. 2 and Oct. 26, 1913. Fridtjof Nansen continued his trans-Siberian journey in a small steamer up the Yenisei River to Yeniseisk.