On the same voyage I saw one in the hands of a German trader. It was a young male, about one year old. He promptly answered the food sound. Then I called him to come to me; but this sound he neither answered nor complied with. He looked at me as if to ask where I had learned his language. I repeated the sound several times, but elicited no answer. I have elsewhere called attention to the fact that these apes do not answer the call when they can see the one who makes it, and they do not always comply with it. In this respect they behave very much like young children, and it may be remarked that one difficulty in all apes is to secure fixed attention. This is exactly the same with young children. Even when they clearly understand, sometimes they betray no sign of having heard. At other times they show that they both hear and understand, but do not comply. Another specimen that was brought aboard a ship when I was present was a young male, something less than two years old. He was sullen and morose. He did not resent my approaches, but he did not encourage them. I first spoke to him with the food sound, but he gave no heed. I retired a little distance from him and called him, but he paid no attention. I then used the sound of warning; he raised his head and looked in the direction from which the sound came. I repeated it, and he looked at me for a moment and turned his head away. I repeated it again. He looked at me, then looked around as if to see what it meant, and again resumed his attitude of repose. On my last voyage to the coast I saw a very good specimen in the Congo. It was a female, a little more than two years old. She was also of a dark complexion, but quite intelligent. She had been captured north of there, and within the limits elsewhere described. At the time I saw her she was ill and under treatment; but her master, the British consul, told me that when she was well she was bright and sociable. I made no attempt to talk with her, except some time after having left her I gave the call sound. She answered by looking around the corner of the house. I do not know whether she would have come or not, as she was tied and could not have come had she desired to do so. I have seen a few specimens of this ape, and most of them appear to be of a somewhat higher order than the ordinary chimpanzee; but there is among them a wide range of intelligence. It would be a risk to say whether the lowest specimen of kulu is higher or lower than the highest specimen of the common chimpanzee, but taken as a whole they are much superior. I shall not describe the specimens which have been known in captivity, since most of them have been amply described by others.