Mike, without saying a word, had unslung the gun and dropped on his knee, for there was not a moment to be lost.  In another instant the fierce wolf would have sprung at my uncle's throat, and might have taken his life; or, at all events, have severely injured him, and that before we could get near enough to render him any assistance.  It all depended on Mike's steady aim, therefore; and although I was a good shot, still I was thankful that he had the gun.