The monkeys are little inferior to the man-like races in their intelligence and in the general similarity of their feelings and instincts to those of men. Monkeys live in tribes, and at the head of each tribe is an old male chief who has won his place by his strength, courage, and ability. Monkeys have excellent memories and keen observation, and are able to recognise their friends in a crowd even after long absences. They are proverbially imitative, have a strong desire for knowledge, and are exceedingly sensitive and sympathetic in their natures. Sympathy and curiosity, the two most prominent traits in simian psychology, are, significantly, the two most important facts in the psychology of man. Sympathy and curiosity lie at the foundation of human civilisation, sympathy at the foundation of morals, and curiosity of invention and science. The monkey whose diary appears in the closing pages of Romanes’ ‘Animal Intelligence’ was possessed of an almost ravenous desire to know. He spent hour after hour in exploration, examining with the indomitable patience of a scientist everything that came within the bounds of his little horizon. And when he had found out any new thing, he was as delighted over it as a boy who has solved a hard problem, repeating the experiment over and over until it was thoroughly familiar to him. Among the many things he discovered for himself was the use of the lever and the screw. Monkeys are the most affectionate of all animals excepting dogs and men. This affection reaches its culmination, as among men, in the love of the mother for her child. The mother monkey’s little one is the object of her constant care and affection. She nurses and bathes it, licks it and cleans its coat, and folds it in her arms and rocks it as if to lull it to sleep, just as human mammas do. She divides every bite with her little one, but does not hesitate to chastise it with slaps and pinches when it is rude. The monkey child is generally very obedient, obedient enough for an example to many a human youngster. ‘Very touching,’ says Brehm, from whom many of the foregoing facts are gleaned, ‘is the conduct of the mother when her baby is obviously suffering. And if it dies she is in despair. For hours, and even for days, she carries the little corpse about with her, refuses all food, sits indifferently in the same spot, and often literally pines to death’.[4]