It is not derogatory to the memory of Moses that I should say this, nor does it lessen my affection for him. Our passions are not moved by visible forces nor measured by fixed units: they disdain all laws of logic, and spurn the narrow bounds of reason; they obey no code of ethics that can be defined, and conform to no theory of action.

As soon as I saw this little ape I expressed a desire to own him, so the trader in charge bought him and presented him to me. As it was intended that he should be the friend and ally of Moses, although not his brother, we conferred upon him the name of Aaron, as the two names are so intimately associated in history that the mention of one always suggests the other.

Aaron was captured in the Esyira jungle by these same hunters, about one day's journey from the place where I secured him; and in this event began a series of sad scenes in the brief but varied life of this little hero that seldom come within the experience of any creature.

At the time of his capture his mother was killed in the act of defending him from the cruel hunters, and when she fell to the earth, mortally wounded, this brave little fellow stood by her trembling body, defending it against her slayers, until he was overcome by superior force, seized by his captors, bound with strips of bark, and carried away into captivity.

No human can refrain from admiring his conduct in this act, whether it was prompted by the instinct of self-preservation or by a sentiment of loyalty to his mother, for he was exercising that prime law of nature which actuates all creatures to defend themselves against attack, and his wild, young heart throbbed with like sensations to those of a human under a like ordeal.

I do not wish to appear sentimental by offering a rebuke to those who indulge in the sport of hunting, but much cruelty could be obviated without losing any of the pleasure of the hunt, and I have always made it a rule to spare the mother with her young. Whether animals feel the same degree of mental and physical pain as man or not, they do, in these tragic moments, evince a certain amount of concern for one another, which imparts a tinge of sympathy that must appeal to any one who is not devoid of every sense of mercy.

It is true that it is often difficult, and sometimes impossible, to secure the young by other means; but the manner of getting them often mars the pleasure of having them, and while Aaron was, to me, a charming pet and a valuable subject for study, I confess the story of his capture always touched me in a tender spot.

I may here mention that the few chimpanzees that reach the civilised parts of the world are but a small percentage of the great number that are captured. Some die on their way to the coast, others die after reaching it, and scores of them die on board the ships to which they are consigned for various ports of Europe and other countries. It is not often from neglect or cruelty, but usually from a change of food, climate, or condition, yet the creature suffers just the same whether the cause is from design or accident. One fruitful source of death among them is pulmonary trouble of various types.

One look at the portrait of Aaron will impress any one with the high mental qualities of this little captive, but to see and study him in life would convince a heretic of his superior character. In every look and gesture there was a touch of the human that no one could fail to observe. The range of facial expression surpassed that of any other animal I have ever studied. In repose, his quaint face wore a look of wisdom becoming to a sage; while in play it was crowned with a grin of genuine mirth. The deep, searching look he gave to a stranger was a study for the psychologist, while the serious, earnest look of inquiry when he was perplexed would amuse a stoic. All these changing moods were depicted in his mobile face, with such intensity as to leave no room to doubt the activity of certain faculties of the mind in a degree far beyond that of animals in general; and his conduct, in many instances, showed the exercise of mental powers of a higher order than that limited agency known as instinct.

In addition to these facts, his voice was of better quality and more flexible than that of any other specimen I have ever known. It was clear and smooth in uttering sounds of any pitch within its scope, while the voices of most of them are inclined to be harsh or husky, especially in sounds of high pitch.