The conduct of the white strangers it was that caused him the greatest perturbation. He puckered his brows into a frown of deep thought. It was well, thought he, that he had not given way to his first impulse to rush forward and greet these white men as brothers.
They were evidently no different from the black men — no more civilized than the apes — no less cruel than Sabor.

Ch. 13 : His Own Kind - Tarzan of the Apes (1912)