that walked erect upon their hind paws and they were learning it slowly, and always to their sorrow.
Shortly after the blacks had departed, Tarzan swung easily to the trail. Sniffing suspiciously, he circled the edge of the pit. Squatting upon his haunches, he scraped away a little earth to expose one of the cross-bars. He sniffed at this, touched it, cocked his head upon one side, and contemplated it gravely for several minutes. Then he carefully recovered it, arranging the earth as neatly as had the blacks. This done, he swung himself back among the branches of the trees and moved off in search of his hairy fellows, the great apes of the tribe of Kerchak.
Once he crossed the trail of Numa, the lion, pausing for a moment to hurl a soft fruit at the snarling face of his enemy, and to taunt and insult him, calling him eater of carrion and brother of Dango, the hyena. Numa, his yellow-green eyes round and burning with concentrated hate, glared up at the dancing figure above him. Low growls vibrated his heavy jowls and his great rage transmitted to his sinuous tail a sharp, whiplike motion; but realizing from past experience the futility of long distance argument with the ape-man, he turned presently and struck off into the tangled vegetation which hid him from the view of his tormentor. With a final scream of jungle invective and an apelike grimace at his departing foe, Tarzan continued along his way.
