William H. Gilder, Schwatka's Search: Sledging in the Arctic in Quest of the Franklin Records
“ The country is filled with reindeer, and on every hill-side their breath can be seen rising like clouds of steam. A herd that was frightened by the dogs, which were following the musk-ox tracks, scampered off in every direction, and it looked as if a lot of locomotives had been let loose over the country, the smoke coming from their lungs in great puffs as they ran, and streaming along behind them. When the sledges are moving during a clear cold day, the position of any one of them is known to the team, though they may be widely separated. ”
