An instance has been related to the writer in which an extraordinary display of this feeling was made. A gentleman, on coming home at night, found he had forgotten his key, and attempted to enter the house by the window of a room in which his dog was on duty as a night-watch. To his surprise and annoyance the animal would not permit him to enter, and attacked him every time he tried to climb in. The animal knew him well, responded to his attempts to fondle it, but the moment he made an attempt to enter the window it became hostile and seemed ready to spring upon him. In its small brain was the feeling that no one, master or stranger, had the right to enter that house at night by the window, and it was there to perform its duty without regard to persons. In the end, the gentleman was obliged to leave and seek shelter elsewhere. The development of the sense of duty and the growth of moral restriction in primitive man were probably very slow, much more so than the evolution of intelligence. The social habit of man doubtless rendered necessary, at an early period, some restraints on the actions of individuals, and these in time gained the strength of unwritten law; but many of them were scarcely what we should call moral obligations. Many such restrictions exist among savage tribes to-day, and to these we must turn for examples of their character. We, for instance, look upon theft and lying as immoral practices, but such is not the case with savages generally, most of whom will steal if the opportunity offers, while they will lie in so transparent and useless a manner as to indicate that they see nothing wrong in this practice. And yet the aborigines of India, many of whom are very immoral according to our standard, are often strongly averse to untruthfulness. "A true Gond," says Mr. Grant, "will commit a murder, but he will not tell a lie." It is well known that truthfulness was one of the chief virtues of the ancient Persians, a virtue that was accompanied by much which we would call immoral. The Hindoo devotee is exceedingly tender of the lives of animals, while he is often callous to human suffering. Disregard of human suffering, indeed, showed itself strongly through all the past ages, men being slaughtered with as little compunction as if they were so many wild beasts, while frightful tortures were inflicted with an extraordinary absence of humane feeling. And these excesses were committed by persons who in the ordinary affairs of life were frequently tender in feeling and conscientious in action.