It is unnecessary for me to give the details of the first part of my long journey. My companion was guided by a perceptive faculty that, like the compass, enabled him to keep in the proper course. He did not question those whom we met, and made no endeavor to maintain a given direction; and yet he was traveling in a part of the country that was new to himself. I marveled at the accuracy of his intuitive perception, for he seemed never to be at fault. When the road forked, he turned to the right or the left in a perfectly careless manner, but the continuity of his course was never interrupted. I began mentally to question whether he could be guiding us aright, forgetting that he was reading my thoughts, and he answered: "There is nothing strange in this self-directive faculty. Is not man capable of following where animals lead? One of the objects of my special study has been to ascertain the nature of the instinct-power of animals, the sagacity of brutes. The carrier pigeon will fly to its cote across hundreds of miles of strange country. The young pig will often return to its pen by a route unknown to it; the sluggish tortoise will find its home without a guide, without seeing a familiar object; cats, horses and other animals possess this power, which is not an unexplainable instinct, but a natural sense better developed in some of the lower creatures than it is in man. The power lies dormant in man, but exists, nevertheless. If we develop one faculty we lose acuteness in some other power. Men have lost in mental development in this particular direction while seeking to gain in others. If there were no record of the fact that light brings objects to the recognition of the mind through the agency of the eye, the sense of sight in an animal would be considered by men devoid of it as adaptability to extraordinary circumstances, or instinct. So it is that animals often see clearly where to the sense of man there is only darkness; such sight is not irresponsive action without consciousness of a purpose. Man is not very magnanimous. Instead of giving credit to the lower animals for superior perception in many directions, he denies to them the conscious possession of powers imperfectly developed in mankind. We egotistically aim to raise ourselves, and do so in our own estimation by clothing the actions of the lower animals in a garment of irresponsibility. Because we can not understand the inwardness of their power, we assert that they act by the influence of instinct. The term instinct, as I would define it, is an expression applied by men to a series of senses which man possesses, but has not developed. The word is used by man to characterize the mental superiority of other animals in certain directions where his own senses are defective. Instead of crediting animals with these, to them, invaluable faculties, man conceitedly says they are involuntary actions. Ignorant of their mental