I do not know how long we stayed motionless gazing at this marvelous spectacle. A strong wind blew towards us and we were well concealed, so there was no chance of discovery. From time to time the little ones played round their parents in unwieldy gambols, the great beasts bounding into the air and falling with dull thuds upon the earth. The strength of the parents seemed to be limitless, for one of them, having some difficulty in reaching a bunch of foliage which grew upon a considerable-sized tree, put his forelegs round the trunk and tore it down as if it had been a sapling. The action seemed, as I thought, to show not only the great development of its muscles, but also the small one of its brain, for the whole weight came crashing down upon the top of it, and it uttered a series of shrill yelps to show that, big as it was, there was a limit to what it could endure. The incident made it think, apparently, that the neighborhood was dangerous, for it slowly lurched off through the wood, followed by its mate and its three enormous infants. We saw the shimmering slaty gleam of their skins between the tree trunks, and their heads undulating high above the brushwood. Then they vanished from our sight.