In the essay and especially in poetry the cat has become a favourite subject, but in fiction it must be admitted that he lags considerably behind the dog. The reasons for this apparently arbitrary preference on the part of authors are perfectly easy to explain. The instinctive acts of the dog, who is a company-loving brute, are very human; his psychology on occasion is almost human. He often behaves as a man would behave. It is therefore a comparatively simple matter to insert a dog into a story about men, for he can often carry it along after the fashion of a human character.