The horned capucin, or sapajou (Cebus fatuellus), is remarkable for two points of hair which stand out from the forehead, and give it the appearance of having horns.    From Wordnik.com.  [The Western World Picturesque Sketches of Nature and Natural History in North and South America] Reference

To put a wild sapajou monkey, -- weak, timid and afraid, -- in a strange and formidable prison box filled with strange machinery, and call upon it to learn or to invent strange mechanical processes, is like bringing a boy of ten years up to a four-cylinder duplex Hoe printing-and-folding press, and saying to him: "Now, go ahead and find out how to run this machine, and print both sides of a signature upon it.".    From Wordnik.com.  [The Minds and Manners of Wild Animals A Book of Personal Observations] Reference

“It was a monkey, a sapajou, an orangoutang, a baboon, a gorilla, a sagoin.    From Wordnik.com.  [The Mysterious Island] Reference