it was necessary to keep the mouth closed and breathe through the nose, at least when the air was forty or fifty degrees below freezing. When it went on lower than that, the whole breathing process was further complicated by the rapid freezing of one's exhaled breath; if you didn't look out your nostrils might freeze shut, and then to keep from suffocating you would gasp in a lungful of razors.
Under certain conditions our exhalations freezing instantly made a tiny crackling noise, like distant firecrackers, and a shower of crystals: each breath a snowstorm.
*wince* This is making me ache with cold by proxy. Good summer read I'd say.
On a usual day we would have pulled for eleven or twelve hours, and made between twelve and eighteen miles.
It does not seem a very good rate, but then conditions were a bit adverse.
You don't say... (he's not even referring to the cold, the confident bastard)