There were but few articles of food that he and Moses liked in common, and, therefore, they had no occasion to quarrel; but they never played together or cultivated any friendly terms, as the chimpanzees did among themselves. This may have been due to the fact that the gorilla was so exclusive in his demeanor towards the chimpanzee as to forbid all attempts of the latter to become intimate. The chimpanzee by nature is more sociable and is fond of human society. He imitates the actions of man in many things and quickly adapts himself to new conditions, while the gorilla is selfish and retiring. He can seldom be reconciled to human society. He does not imitate man nor readily yield to the influence of civilization.

One special trait of the gorilla which I wish to emphasize is that he is one of the most taciturn of all the family. This fact does not confirm my theory as to their faculty of speech; but it is a fact, so far as I observed, although the natives say that he is as loquacious as the chimpanzee. Among the specimens that I have studied, both wild and in captivity, I have never heard but four sounds that differed from each other, and of these only two could properly be defined as speech. I do not include the screaming sound described in another chapter. I have not been able, so far, to translate the sounds that I have heard, and they cannot be spelled with our letters.

There is one sound which Othello often used. It was not a speech sound, but a kind of whine, always coupled with a deep sigh. When left alone for a time he became oppressed with solitude. At such times he often heaved a deep sigh and uttered this strange sound. The tone and manner strongly appealed to the feelings of others, and while he did not appear to address it to any one or have any design in making it, it always touched a sympathetic chord, and I was sometimes tempted to release him. Another sound which was not within the pale of speech was a kind of grumbling sound. This frequently occurred when he was eating. It was not exactly a growl, but a kind of complaint. Twice I heard this same sound made by wild ones in the forest near my cage. The only thing that I can compare it to is the habit that cats have of growling while eating. It appears to be done only when something is near. It is possibly intended to deter others from trying to take the food.

During my life in the cage I saw twenty-two gorillas; but I shall describe only a few of them, as their actions in most instances were similar. The first one that I had the pleasure of seeing in the jungle came within a few yards of the cage before it was yet in order to receive. He was exactly half grown. He must have been attracted by the noise made in putting the cage together. He advanced with caution, and when I discovered him he was peering through the bushes, as if to ascertain the cause of the sounds. When he saw me, he tarried only a few seconds and hurried off into the jungle. I did not disturb or shoot at him, because I desired him to return.

On the third day after I went to live in the cage a family of ten gorillas was seen to cross an open space along the back of a batch of plantains near one of the villages. A small native boy was within about twenty yards of them when they crossed the path in front of him. A few minutes later I was notified of their vicinity. I took my rifle and followed them into the jungle until I lost the trail. A few hours after this they were again seen by some natives not far away from my cage, but they did not come near enough to be seen or heard. The next day a family came within some thirty yards of the cage. The bush was so dense that I could not see them, but I could distinguish four or five voices. They seemed to be engaged in a broil of some kind. I suppose it was the family that had been seen the day before. The second night after that I heard the screams of one in the forest some distance from me, but I do not know whether it was the king of this family or another.

One day as I sat alone a young gorilla, perhaps five years old, came within six or seven yards of the cage and took a peep. I do not know whether or not he was aware of its being there until he was so near. He stood for a time, almost erect, with one hand holding on to a bough. His lower lip was relaxed, showing the red line mentioned elsewhere, and the end of his tongue could be seen between his parted lips. He did not evince either fear or anger, but rather appeared to be amazed. I heard him creeping through the bush a few seconds before I saw him. As a rule, they move so stealthily as not to be heard. I know of no other animal of equal size that makes so little noise in going through the forest. During the short time he stood gazing at me I sat still as a statue, and I think he was in doubt as to whether or not I was alive. He did not run away, but after a brief pause turned off at an angle and quietly departed. He lost no time, but made no great haste. The only sound he made was a low grunt, and this he did not repeat.

At another time I heard two making a noise among the plantains near me. I could obtain only a glimpse of them, but as well as I could see they were of good size, being almost grown. They were making a low sound from time to time, something such as I have described; but I could not see them well enough to frame any opinion as to what it meant. They were certainly not quarreling, and I was not sure that they were eating. I afterwards went and looked to see if I could find where they had broken any of the stalks. Their trail was visible through the grass and weeds, but I could find no broken stalk. They were moving at a very leisurely gait and must have been within hearing distance some ten or twelve minutes. They were quite alike in color and appeared to be so in size, although the adult male attains a much greater size than the female.

On one occasion I was standing outside of the cage some twenty yards away, and Moses was sitting on a dead log near by. I turned to him and was in the act of sitting down by him when he gave alarm. This he did in an undertone, apparently to avoid attracting the attention of the thing against which the warning was intended. I looked around, and discovered a gorilla standing not twenty yards away. He had just discovered us. He gazed for a moment and started on, moving obliquely towards the cage. I turned to retreat. At this instant Moses gave one of his piercing screams, which frightened the gorilla and he fled. He changed his course almost at right angles. He was going at a good rate before Moses screamed, but he at once increased his pace.

One day I heard three sounds which a native boy assured me were made by gorillas; they were in different directions from the cage. It was not a scream nor a howl, but somewhat resembled the human voice calling out with a sound like “he-oo!” These sounds were repeated at intervals, but did not appear to be in the relation of call and answer; and the animals making them did not approach each other while calling. The sounds were the same except in volume. One of them appeared to be made by an animal much larger than the animals that had made the two other sounds. I should state that this sound rarely occurred within my hearing during my stay in that part, and with one exception I never heard a gorilla make any loud sound during the day.

Another interesting specimen came prowling through the jungle as if he had lost his way. He found a small opening, or tunnel, which I had cut through the foliage in order to get a better view. Turning into that, he came a few steps towards the cage before he discovered it. Suddenly he stopped and squatted on the ground. He did not sit flat down. For a few seconds he was motionless. So was I. He slowly raised one arm till his hand was above his head, in which position he sat for a few moments. Then he moved his hand quickly forward, as if to motion at me. He did not drop his hand to the ground, but held it for a short time at an angle from his face. Then he slowly let it down till it reached the ground. During this time he kept his eyes fixed on me. At length he raised the other arm and seized hold of a strong bush, by which he slowly drew himself to a half-standing position. Thus he stood for a few seconds, with one hand resting on the ground. Suddenly he turned to one side, parted the bushes, and disappeared. He uttered no sound whatever. Another came within about thirty yards of my retreat. When he discovered me he stopped and stared in a perplexed manner. He turned away to retreat, but, after going a few feet, turned round and sat down on the ground. He remained in that attitude for more than half a minute; then he rose and retired in the direction from which he had come.