The Guachos say that the jaguar, when wandering about at night, is much tormented by the foxes yelping as they follow him; this may perhaps serve to alarm his prey, but must be as teasing to him as the attentions of swallows are to an owl who happens to be taking a daylight promenade; and if owls ever swear, it is under those circumstances. Mr. Darwin, when hunting on the banks of the Uruguay, was shown three well-known trees to which the jaguars constantly resort, for the purpose, it is said, of sharpening their claws. Every one must be familiar with the manner in which cats, with outstretched legs and extended claws, will card the legs of chairs and of men; so with the jaguar; and of these trees, the bark was worn quite smooth in front; on each side there were deep grooves, extending in an oblique line nearly a yard in length. The scars were of different ages, and the inhabitants could always tell when a jaguar was in the neighborhood, by his recent autograph on one of these trees. We have seen tigers stretching their enormous limbs in this manner, and were recently interested in watching the proceedings of two beautiful young jaguars now in the Zoological Gardens, Regent's Park; they are scarcely half-grown and as playful as kittens. After chasing and tumbling each other over several times, they went as by mutual consent to the post of their cage, and there carefully and with intensely placid countenances scraped away with their claws as they would have done against the trees had they been in their native woods. This proceeding satisfactorily concluded, they swarmed up and down the post, appearing to vie with each other as to which should be first. The six young leopards are equally graceful and active with the above, and the elegance and quickness of their movements cannot fail to command admiration. They seem to be particularly fond of bounding up and down the trees, and sometimes rest in the strangest attitudes, stuck in the fork of a bough, or sitting, as it were; astride of one, with their hind legs hanging down. M. Sonnini bears testimony to the extraordinary climbing powers of the jaguar; "For," says he, "I have seen, in the forests of Guiana, the prints left by the claws of the jaguar on the smooth bark of a tree from forty to fifty feet in height, measuring about a foot and a half in circumference, and clothed with branches near its summit alone. It was easy to follow with the eye the efforts which the animal had made to reach the branches; although his talons had been thrust deeply into the body of the tree, he had met with several slips, but had always recovered his ground; and attracted, no doubt, by some favorite prey, had at length succeeded in gaining the very top!"