In the Washington collection there was once a Capuchin monkey by the name of Pedro. When I first visited this bright little fellow he occupied a cage in common with several other monkeys of different kinds. All of them seemed to impose upon little Pedro, and a mischievous young spider-monkey found special delight in catching him by the tail and dragging him about the floor of the cage. I interfered on behalf of Pedro and drove the spider-monkey away. Pedro appreciated this and began to look upon me as a benefactor. When he saw me he would scream to attract my attention and then beg for me to come to him. I induced the keeper to place him by himself in a small cage. This seemed to please him very much. When I went to record his sounds on the phonograph, I held him on my arm. He took the tube into his tiny, black hands, held it close up to his mouth and talked into it just like a good little boy who knew what to do and how to do it. He sometimes laughed, and he frequently chattered to me as long as he could see me. He would sit on my hand and kiss my cheeks, put his mouth up to my ear and chatter just as though he knew what my ears were for. He was quite fond of the head-keeper and also of the director; but he entertained a great dislike for one of the assistant keepers. He often told me some very bad things about that man, though I could not understand what he said. I shall long remember how this dear little monkey used to cuddle under my chin and try to make me understand some sad story which seemed to be the burden of his life. He readily understood the sounds of his own speech when repeated to him, and I made some of the best records of his voice that I ever succeeded in making of any monkey. Some of them I preserved for a long time. They displayed a wide range of sounds, and I studied them with special care and pleasure, because I knew that they were addressed to me. Being aware that the little creature was uttering these sounds to me with the hope that I would understand them, I was more anxious to learn just what he really meant than if it had contained only something addressed to another. This little simian was born in the Amazon Valley, in Brazil, and was named for the late emperor, Dom Pedro.