Tarzan of the Apes, young and savage beast of the jungle, wondered at the cruel brutality of his own kind.
Sheeta, the leopard, alone of all the jungle folk, tortured his prey. The ethics of all the others meted a quick and merciful death to their victims.
Tarzan had learned from his books but scattered fragments of the ways of human beings.

Ch. 11 : "King of the Apes" - Tarzan of the Apes (1912)