In a cupboard filled with books he came across one with brightly colored pictures — it was a child's illustrated alphabet — A is for Archer Who shoots with a bow. B is for Boy, His first name is Joe. The pictures interested him greatly.
There were many apes with faces similar to his own, and further over in the book he found, under "M," some little monkeys such as he saw daily flitting through the trees of his primeval forest. But nowhere was pictured any of his own people; in all the book was none that resembled Kerchak, or Tublat, or Kala.

Ch. 6 : Jungle Battles - Tarzan of the Apes (1912)