That her little Tarzan could destroy a great bull gorilla she knew to be improbable, and so, as she neared the spot from which the sounds of the struggle had come, she moved more warily and at last slowly and with extreme caution she traversed the lowest branches, peering eagerly into the moon- splashed blackness for a sign of the combatants.
1912 October, Edgar Rice Burroughs, “Tarzan of the Apes”, in The All-Story, New York, N.Y.: Frank A. Munsey Co.; republished as chapter 6, in Tarzan of the Apes, New York, N.Y.: A. L. Burt Company, 1914 June,