In the way of direct proof, to return to the muttons, it may be observed that the next link to manhood, in the philosopher's chain, is that highly attractive animal which M. DU CHAILLU has recently introduced to the general public. The points of resemblance betwixt the Gorilla and the Boy are numerous and striking. In most cases, the two animals have an equally pleasing exterior. They both have the ability to climb giddy heights, inaccessible to any other wingless biped. Their language is not dissimilar, the same unintelligible chatter being characteristic of both. As the argument proceeds, it will be seen that distinctive traits belonging to lower classes of the animal kingdom are totally extinct in the Gorilla, while they are emphatically visible in his successor. Thus, taking the Laughing Hyena as the next illustration, it will be remembered by all students of GOLDSMITH'S _Animated Nature_, that this amiable quadruped invariably exercises his risibles when he is crunching the bones of some other less truculent quadruped. It is "solitary, cruel, and untamable, digs its food out of graves," cachinnating the while like a thousand or fifteen hundred of brick. There are other ravenous beasts in the world; but this one is peculiar in that he laughs over his work, which is also his pastime. Now, if you wish to hear a Boy laugh--a horse-laugh, a giant-laugh--just put some other animal, human or otherwise, through a course of torture. Twist a pig's tail until it comes out; or, if you don't like the occupation, the Boy will cheerfully do it--and will drown the squeal of the porker in his own uproarious merriment. What do you suppose were the age and sex of the inventor of the game called "Tying a tin kettle to a dog's tail?" And do you suppose this inventor stood by, in silent gravity, to witness the success of the experiment? The yelp of the astounded dog, and the clatter of the kitchen utensil so strangely misplaced, were doubtless swallowed up in the loud guffaws of the Laughing Hyena on two legs.