It is true, for instance, that he ignores the advice of the old man from Sulphur Creek (about the dangers of traveling without a human companion, in such temperatures), and that he shows little regard for his dog (which he treats in a utilitarian way). But this conduct is less a sin, I think, than an imperfection, or a mistake; and even if it were a sin, it would not be a very grave one. A venial sin, perhaps, but not a mortal sin; his soul would not be imperiled because of it. Or, anyway, not because of it alone.