Yet the nature of their voyage was such that white men might have deemed verbal intercourse an occasional necessity, as their route lay through much rugged and wild scenery, where the streams up which they had to force their way were in some places obstructed by rapids and shallows, and a mistake on their part might have brought sudden disaster and ruin. For their canoe was deeply laden with the furs which they had secured during the labours of the past winter, and on the sale of which to the fur-traders depended much of their and their families' felicity or misery during the winter which was to come.