A frequent and welcome visitor to my study was a little boy about six years old. For him Nellie entertained great fondness. At the sight of the boy, Nellie went into perfect raptures, and when leaving him she called him so earnestly and whined so pitifully that one could not refrain from sympathy. On his return she would laugh audibly and give every sign of extreme joy. She never tired of his company, nor gave any attention to others while he was present. Some children next door found great delight in calling to see Nellie, and she always evinced great pleasure at their visits. On these occasions she consciously entertained them and showed herself to the best advantage. In order to make a good record of her sounds, and especially of her laughter, I brought the little boy to my aid. The boy would conceal himself in the room, and after Nellie had called him a few times he would jump out and surprise her. This would cause her to laugh till she could be heard throughout the whole house. In this manner I secured some of the best records I have ever made of the laughter of monkeys. When the boy concealed himself again, I secured the peculiar sound which she used when trying to attract his attention. Nellie had spent much of her life in captivity, and had been used to the society of children. She rarely ever betrayed any aversion to them. She delighted to pat their cheeks, pull their ears, and tangle their hair. She took great pleasure in cleaning one’s finger-nails. She did this with the skill of a manicure. She found pleasure in picking the shreds, ravelings, or specks from one’s clothing. She was not selfish in selecting her friends. She was influenced neither by age nor by beauty. To be out of her cage and supplied with toys was all she demanded to make her happy. I have sometimes thought she preferred such a life to the freedom of her Amazon forests. It is to be regretted that monkeys are so destructive that one dare not turn them loose in a room where there is anything that can be torn or broken. They enjoy such mischief. Nellie often begged me so piteously to be taken from her little iron prison that I could not refuse her request, even at the cost of much trouble in preparing the room for her.