From almost the moment that they had entered the forest Tarzan had known that he might escape. It would have been the work of but an instant to have leaped from the back of the Gorobor upon which he was riding to one of the lower branches of the forest, some of which barely grazed their heads as they passed beneath, and once in the trees he knew that no Horib nor any Gorobor could catch him, but he could not desert Jana; nor could he acquaint her with his plans for they were never sufficiently close together for him to whisper to her unheard by the Horibs. But even had he been able to lay the whole thing before her, he doubted her ability to reach the safety of the trees before the Horibs recaptured her. If he could but get near enough to take hold of her, he was confident that he could effect a safe escape for both of them and so he rode on in silence, hoping against hope that the opportunity he so desired would eventually develop. They had reached the upper end of the lake and were skirting its western shore and, from remarks dropped by the Horibs in their conversations, which were far from numerous, the ape-man guessed that they were almost at their destination, and still escape seemed as remote as ever. Chafing with impatience Tarzan was on the point of making a sudden break for liberty, trusting that the unexpectedness of his act would confuse the lizard-men for just the few seconds that would be necessary for him to throw Jana to his shoulder and swing to the lower terrace that beckoned invitingly from above. The nerves and muscles of Tarzan of the Apes are trained to absolute obedience to his will; they are never surprised into any revelation of emotion, nor are they often permitted to reveal what is passing in the mind of the ape-man when he is in the presence of strangers or enemies, but now, for once, they were almost shocked into revealing the astonishment that filled him as a vagrant breeze carried to his nostrils a scent spoor that he had never thought to know again.