On one occasion I heard one in the bush not far away from the cage. I called him with the usual sound and he answered, but did not come to the cage. It is probable that he could see it, and was afraid of it. I tried to induce Moses to call him, and he did once utter the sound, but he appeared to regret having made the attempt. I called again and he answered, and from the manner in which Moses behaved it was evident that he understood it. He would not attempt the call again, but clung to my neck with his face buried under my chin. It was probably jealousy that caused him to refuse, because he did not want the other to share my attentions. I gave the food sound, but I could not induce the visitor to come nearer. I failed to get a view of him so as to tell how large he was, but from his voice he must have been about grown. Whether he was quite alone or not I was not able to tell, but only the one voice could be heard. Another time, while sitting quite alone, a young chimpanzee, perhaps five or six years old, appeared at the edge of a small opening of the bush. He plucked a bud or leaf from a small plant. He raised it to his nose and smelt it. He picked three or four buds of different kinds, one or two of which he put in his mouth. He turned aside the dead leaves that were lying on the ground as if he expected to find something under them. I spoke to him, using the call sound; he instantly turned his eyes towards me, but made no reply. I uttered the food sound and he replied, but stood where he was. He betrayed no sign of fear, and little of surprise. He surveyed the cage and myself, and I repeated the sound two or three times. He refused to approach any nearer. He turned his head from side to side for a moment as if in doubt which way to go; then turned aside and disappeared in the bush. He did not run or start away as if in great fear, but by the sound of the shaking bushes it could be told that he increased his speed after he once disappeared from view. One day I had been for a stroll with Moses and the boy. As we returned to the cage we saw a chimpanzee about half-grown; he was crossing the rugged little path about thirty yards away from us. He paused for a moment to look at us, and we stopped. I tried to induce Moses to call out to him, but he declined to do so. As the stranger turned aside I called to him myself, but he neither stopped nor answered. This one appeared to be quite brown, but the boy assured me his hair was jet black, but his skin being light gave him this colour. To satisfy myself, I had Moses placed in the same place and position, and looking at him from the same distance I was convinced that the boy was right.