“Crusoe did not bark; he seldom barked; he usually either said nothing, or gave utterance to a prolonged roar of indignation of the most terrible character, with barks, as it were, mingled through it. It somewhat resembled that peculiar and well-known species of thunder, the prolonged roll of which is marked at short intervals in its course by cannon-like cracks. It was a continuous, but, so to speak, knotted roar.”