gathered in the slack of the rope and, bracing himself against the bole of the tree, pulled steadily upward. Slowly the stakes rose from the trench in which they were imbedded and with them rose Numa's suspicion and growling.
Was this some new encroachment upon his rights and his liberties? He was puzzled and, like all lions, being short of temper, he was irritated. He had not minded it when the Tarmangani squatted upon the verge of the pit and looked down upon him, for had not this Tarmangani fed him? But now something else was afoot and the suspicion of the wild beast was aroused. As he watched, however, Numa saw the stakes rise slowly to an erect position, tumble against each other and then fall backwards out of his sight upon the surface of the ground above. Instantly the lion grasped the possibilities of the situation, and, too, perhaps he sensed the fact that the man-thing had deliberately opened a way for his escape. Seizing the remains of Bara in his great jaws, Numa, the lion, leaped agilely from the pit of the Wamabos and Tarzan of the Apes melted into the jungles to the east.
On the surface of the ground or through the swaying branches of the trees the spoor of man or beast was an open book to the ape-man, but even his acute senses were baffled by the spoorless trail of the airship. Of what good were eyes, or ears, or the sense of smell in following a thing whose path had lain through the shifting air thousands of feet above the tree tops? Only upon his sense of di-
