From the calls there were evidently two. It was getting dark in the forest, and I began to feel afraid that the animals had smelt us, when I saw a nshiego-mbouvé approach the tree where the shelter was. It ascended by a hand-over-hand movement, and with great rapidity. Then it crept carefully under the shelter, seated itself in the crotch made by a projecting bough, its feet and haunches resting on this bough, then put one arm round the trunk of the tree for security. Thus they rest all night, and this posture accounts for some singular abrasions of the hair on the side of this variety of chimpanzee, which could be seen on the specimens I brought home. No sooner was it seated than it began again to utter its call. It was a male, and was calling for its female. It was answered, when an unlucky motion of one of my men made a noise, and roused the suspicions of the ape in the tree. It looked round. It began preparations to descend and clear out. I fired, and it fell to the ground dead, with a tremendous crash. These nshiego-mbouvé are very shy, and far more difficult to approach than gorillas. How queer they look with their bald heads! The black skin on the top of the head is quite shiny. They must attain great age, and I have often wondered how long the gorilla, chimpanzee, kooloo-kamba, and nshiego-mbouvé live. I should not be surprised if they sometimes live to be a hundred years old. All the varieties of chimpanzees often inhabit the same woods as the gorilla, and they seem to live in harmony with each other. There is food enough for them all; besides, nuts and fruits are very plentiful. When they get old they feed on leaves, for a time comes when their teeth are quite decayed. In one very old nshiego-mbouvé I killed, nearly all of his teeth had dropped out, and he had but four or five left. CHAPTER X. JACK WILL HAVE HIS OWN WAY.--HE SEIZES MY LEG.--HE TEARS MY PANTALOONS.--HE GROWLS AT ME.--HE REFUSES COOKED FOOD.--JACK MAKES HIS BED.--JACK SLEEPS WITH ONE EYE OPEN.--JACK IS INTRACTABLE. Now let us follow that young gorilla, whom I called Jack. Jack, to begin with, was the most untractable little beast one possibly could get hold of. Jack was a little villain, a little rogue, very treacherous, and quite untamable. The kinder I was, the worse he seemed to be. We took him with us in the forest till we returned to our village, and then many of the women disappeared. Jack was smart in his wickedness, and was quite as treacherous as any of the gorillas I had met before. He would not eat any cooked food, and every day I had to send into the forest for berries and nuts. I wish you could have seen his eyes glisten, you would have noticed how treacherous and gloomy they were. Jack was cunning; he would look at me right straight in the face, and when he did that I learned that he meant mischief, and, if close at hand, meant an attack upon me.