Then came a snap on Lake Le Barge, when the cold of outer space smote the tip of the planet, and the force ranged sixty and odd degrees below zero. Here, labouring with open mouth that he might breathe more freely, he chilled his lungs, and for the rest of the trip he was troubled with a dry, hacking cough, especially irritable in smoke of camp or under stress of undue exertion. On the Thirty Mile river he found much open water, spanned by precarious ice bridges and fringed with narrow rim ice, tricky and uncertain. The rim ice was impossible to reckon on, and he dared it without reckoning, falling back on his revolver when his drivers demurred. But on the ice bridges, covered with snow though they were, precautions could be taken. These they crossed on their snowshoes, with long pole
