The sounds which the Rhesus utters in anger are harsh and unmusical, while their sound for food is soft and sympathetic, and I have made a machine which imitates it quite well. The Rhesus belong to the genus _Macacus_, one of the oldest and largest of all Simian genera. I have found the word in the dialect of the white-faced Cebus which corresponds in value to those sounds described in the dialects of the Capuchin and Rhesus monkeys meaning food, but I cannot give the faintest idea of the sound by any combination of letters, nor have I as yet devised any means by which I can imitate it. I recorded this sound on the phonograph more than a year ago, but only within the last few months have been able to tell its meaning. [Sidenote: SOUND OF DANGER] Another sound which is made by this species to express apprehension of remote danger, such as an approaching footstep or some unusual sound, I have also learned. It is very much the same phonetically as that sound which he utters in case of great and sudden alarm, but uttered with much less energy. It resembles slightly the alarm-sound of the Capuchin, but up to this time I have not been able to make a good record of it. Another sound which is peculiar to this species I think is used as a kind of salutation or expression of friendship, which phonetically is quite unlike the corresponding sound in any other dialect that I have studied. I must mention Dolly Varden, who belongs to this species, and with whom I was at one time on very warm terms of friendship. Dolly was very fond of me, and would laugh and play with me by the hour. Her laughter was very human-like, except that it was silent, and in all our play during the lapse of some weeks she never uttered a sound, not even so much as a growl, although I tried by every possible means to induce her to talk. It has occurred to me since that time that she may have been deaf and dumb, but I did not think of testing her on these points while I had an opportunity. It is not usual for monkeys to laugh in silence, although they frequently laugh aloud like human beings; but it is not a common thing for them to remain silent at all times and under all conditions. Dolly was good-natured, playful, and always showed every sign of pleasure at my visits. [Sidenote: "UNCLE REMUS"] In Central Park there is a monkey of this species which I call "Uncle Remus." He is quite fond of me, and, for my amusement, he always wants to whip a little baby monk in the same cage with him whenever I go to visit them. This species belongs to the same genus as the Capuchin, but they differ in mental calibre as widely as the Caucasian differs from the Negro; but in this case the colours are reversed. I have seen a few fairly intelligent white-faces and a great many very stupid Capuchins, but, to strike an average from a great number of each kind, they will be found very widely separated in brain power.