"We should descend the mountains, going directly away from Clovi," replied Jana, "for it is in the mountains that they will look for us. When we have reached the lowland we can turn back along the foot of the range until we are below Zoram, but not until then should we come back to the mountains." The descent of the mountains was slow because neither of them was familiar with this part of the range. Oftentimes, their way barred by yawning chasms, they were compelled to retrace their steps to find another way around. They ate many times and slept thrice and thus only could Tarzan guess that they had consumed considerable time in the descent, but what was time to them? During the descent Tarzan had caught glimpses of a vast plain, stretching away as far as the eye could reach. The last stage of their descent was down a long, winding canyon, and when, at last, they came to its mouth they found themselves upon the edge of the plain that Tarzan had seen. It was almost treeless and from where he stood it looked as level as a lake. "This is the Gyor Cors," said Jana, "and may we not have the bad fortune to meet a Gyor." "And what is a Gyor?" asked Tarzan. "Oh, it is a terrible creature," replied Jana. "I have never seen one, but some of the warriors of Zoram have been to the Gyor Cors and they have seen them. They are twice the size of a tandor and their length is more than that of four tall men, lying upon the ground. They have a curved beak and three great horns, two above their eyes and one above their nose. Standing upright at the backs of their heads is a great collar of bony substance covered with thick, horny hide, which protects them from the horns of their fellows and spears of men. They do not eat flesh, but they are irritable and short tempered, charging every creature that they see and thus keeping the Gyor Cors for their own use." "Theirs is a vast domain," said Tarzan, letting his eyes sweep the illimitable expanse of pasture land that rolled on and on, curving slowly upward into the distant haze, "and your description of them suggests that they have few enemies who would care to dispute their dominion." "Only the Horibs," replied Jana. "They hunt them for their flesh and hide." "What are Horibs?" asked Tarzan. The girl shuddered. "The snake people," she whispered in an awed tone. "Snake people," repeated Tarzan, "and what are they?" "Let us not speak of them. They are horrible. They are worse than the Gyors. Their blood is cold and men say that they have no hearts, for they do not possess any of the characteristics that men admire, knowing not friendship or sympathy or love." Along the bottom of the canyon through which they had descended a mountain torrent had cut a deep gorge, the sides of which were so precipitous that they found it expedient to follow the stream down into the plain in order to discover an easier crossing, since the stream lay between them and Zoram.