Apsley Cherry-Garrard, The Worst Journey in the World.

Since what he is doing is walking across a piece of Antarctica in June, that is, in winter, it is hard to argue with the assessment. This was on Scott's final expedition, but before the disastrous attempt on the Pole. The preposterous walk described was undertaken by three men, and nobody was killed this time: but the other two, Bowers and Oates, died with Scott.