Merian C. Cooper became fascinated by gorillas at the age of 6. In 1899, he was given a book from his uncle called "Explorations and Adventures in Equatorial Africa". The book (written in 1861), chronicled the adventures of Paul Du Chaillu in Africa and his various encounters with the natives and wildlife there. Cooper became fascinated with the stories involving the gorillas, in particular, Du Chaillu's depiction of a particular gorilla known for its "extraordinary size", that the natives described as "invincible" and the "King of the African Forest". When Du Chaillu and some natives encountered a gorilla later in the book he described it as a "hellish dream creature" that was "half man, half beast".