A little mountain stream tumbles down from Kor-ul-GRYF to be joined in the foothills with that which empties the waters of Kor-ul-lul into the valley, forming a small river which runs southwest, eventually entering the valley's largest lake at the City of A-lur, through the center of which the stream passes. An ancient trail, well marked by countless generations of naked feet of man and beast, leads down toward A-lur beside the river, and along this Tarzan guided the GRYF. Once clear of the forest which ran below the mouth of the gorge, Tarzan caught occasional glimpses of the city gleaming in the distance far below him. The country through which he passed was resplendent with the riotous beauties of tropical verdure. Thick, lush grasses grew waist high upon either side of the trail and the way was broken now and again by patches of open park-like forest, or perhaps a little patch of dense jungle where the trees overarched the way and trailing creepers depended in graceful loops from branch to branch. At times the ape-man had difficulty in commanding obedience upon the part of his unruly beast, but always in the end its fear of the relatively puny goad urged it on to obedience. Late in the afternoon as they approached the confluence of the stream they were skirting and another which appeared to come from the direction of Kor-ul-JA the ape-man, emerging from one of the jungle patches, discovered a considerable party of Ho-don upon the opposite bank. Simultaneously they saw him and the mighty creature he bestrode. For a moment they stood in wide-eyed amazement and then, in answer to the command of their leader, they turned and bolted for the shelter of the nearby wood. The ape-man had but a brief glimpse of them but it was sufficient indication that there were Waz-don with them, doubtless prisoners taken in one of the raids upon the Waz-don villages of which Ta-den and Om-at had told him. At the sound of their voices the GRYF had bellowed terrifically and started in pursuit even though a river intervened, but by dint of much prodding and beating, Tarzan had succeeded in heading the animal back into the path though thereafter for a long time it was sullen and more intractable than ever. As the sun dropped nearer the summit of the western hills Tarzan became aware that his plan to enter A-lur upon the back of a GRYF was likely doomed to failure, since the stubbornness of the great beast was increasing momentarily, doubtless due to the fact that its huge belly was crying out for food. The ape-man wondered if the Tor-o-dons had any means of picketing their beasts for the night, but as he did not know and as no plan suggested itself, he determined that he should have to trust to the chance of finding it again in the morning.