one!" cried Tarzan of the Apes. "To the death!" and his blade flashed in the sunlight.

"Let us go, then," said Om-at; "my knife is dry and cries aloud for the blood of Es-sat."

The trail over which Ta-den and Om-at led and which scarcely could be dignified even by the name of trail was suited more to mountain sheep, monkeys, or birds than to man; but the three that followed it were trained to ways which no ordinary man might essay. Now, upon the lower slopes, it led through dense forests where the ground was so matted with fallen trees and over-rioting vines and brush that the way held always to the swaying branches high above the tangle; again it skirted yawning gorges whose slippery-faced rocks gave but momentary foothold even to the bare feet that lightly touched them as the three leaped chamois-like from one precarious foothold to the next. Dizzy and terrifying was the way that Om-at chose across the summit as he led them around the shoulder of a towering crag that rose a sheer two thousand feet of perpendicular rock above a tumbling river. And when at last they stood upon comparatively level ground again Om-at turned and looked at them both intently and especially at Tarzan of the Apes.

"You will both do," he said. "You are fit companions for Om-at, the Waz-don."

"What do you mean?" asked Tarzan.

"I brought you this way," replied the black, "to learn if either lacked the courage to follow where Om-at led. It is here that the young warriors of Es-sat come to prove their courage. And yet, though we are born and raised upon cliff sides, it is considered no disgrace to admit that Pastar-ul-ved, the Father of Mountains, has defeated us, for of those who try it only a few succeed—the bones of the others lie at the feet of Pastar-ul-ved."

Ta-den laughed. "I would not care to come this way often," he said.

"No," replied Om-at; "but it has shortened our journey by at least a full day. So much the sooner shall Tarzan look upon the Valley of Jad-ben-Otho. Come!" and he led the way upward along the shoulder of Pastar-ul-ved until there lay spread below them a scene of mystery and of beauty—a green valley girt by towering cliffs of marble whiteness—a green valley dotted by deep blue lakes and crossed by the blue trail of a winding river. In the center a city of the whiteness of the marble cliffs—a city which even at so great a distance evidenced a strange, yet artistic architecture. Outside the city there were visible about the valley isolated groups of buildings—sometimes one, again two and three and four in a cluster—but always of the same glaring whiteness, and always in some fantastic form.

About the valley the cliffs were occasionally cleft by deep gorges, verdure filled, giving the appearance of green rivers rioting downward toward a central sea of green.

"Jad Pele ul Jad-ben-Otho," murmured Tarzan in the tongue of the pithecanthropi; "The Valley of the Great God—it is beautiful!"

"Here, in A-lur, lives Ko-tan, the king, ruler over all Pal-ul-don," said Ta-den.

"And here in these gorges live the Waz-don," exclaimed Om-at, "who do not acknowledge that Ko-tan is the ruler over all the Land-of-man."

Ta-den smiled and shrugged. "We will not quarrel, you and I," he said to Om-at, "over that which all the ages have not proved sufficient time in which to reconcile the Ho-don and Waz-don; but let me whisper to you a secret, Om-at. The Ho-don live together in greater or less peace under one ruler so that when danger threatens them they face the enemy with many warriors, for every fighting Ho-don of Pal-ul-don is there. But you Waz-don, how is it with you? You have a dozen kings who fight not only with the Ho-don but with one another. When one of your tribes goes forth upon the fighting trail, even against the Ho-don, it must leave behind sufficient warriors to protect its women and its children from the neighbors upon either hand. When we want eunuchs for the temples or servants for the fields or the homes we march forth in great numbers upon one of your villages. You cannot even flee, for upon either side of you are enemies and though you fight bravely we come back with those who will presently be eunuchs in the temples and servants in our fields and homes. So long as the Waz-don are thus foolish the Ho-don will dominate and their king will be king of Pal-ul-don."

"Perhaps you are right," admitted Om-at. "It is because our neighbors are fools, each thinking that his tribe is the greatest and should rule among the Waz-don. They will not admit that the warriors of my tribe are the bravest and our shes the most beautiful."

Ta-den grinned. "Each of the others presents precisely the same arguments that you present, Om-at," he said, "which, my friend, is the strongest bulwark of defense possessed by the Ho-don."

"Come!" exclaimed Tarzan; "such discussions often lead to quarrels and we three must have no quarrels. I, of course, am interested in learning what I can of the political and economic conditions of your land; I should like to know something of your religion; but not at the expense of bitterness between my only friends in Pal-ul-don. Possibly, however, you hold to the same god?"

"There indeed we do differ," cried Om-at, somewhat bitterly and with a trace of excitement in his voice.

"Differ!" almost shouted Ta-den; "and why should we not differ? Who could agree with the preposterous——"

"Stop!" cried Tarzan. "Now, indeed, have I stirred up a hornets' nest. Let us speak no more of matters political or religious."

"That is wiser," agreed Om-at; "but I might mention, for your information, that the one and only god has a long tail."

"It is sacrilege," cried Ta-den, laying his hand upon his knife; "Jad-ben-Otho has no tail!"

"Stop!" shrieked Om-at, springing forward; but instantly Tarzan interposed himself between them.

"Enough!" he snapped. "Let us be true to our oaths of friendship that we may be honorable in the sight of God in whatever form we conceive Him."

"You are right, Tailless One," said Ta-den. "Come, Om-at, let us look after our friendship and ourselves, secure in the conviction that Jad-ben-Otho is sufficiently powerful to look after himself."

"Done!" agreed Om-at, "but——"

"No 'buts,' Om-at," admonished Tarzan.

The shaggy black shrugged his shoulders and smiled. "Shall we make our way down toward the valley?" he asked. "The gorge below us is uninhabited; that to the left contains the caves of my people. I would see Pan-at-lee once more. Ta-den would visit his father in the valley below and Tarzan seeks entrance to A-lur in search of the mate that would be better dead than in the clutches of the Ho-don priests of Jad-ben-Otho. How shall we proceed?"

"Let us remain together as long as possible," urged Ta-den. "You, Om-at, must seek Pan-at-lee by night and by stealth, for three, even we three, may not hope to overcome Es-sat and all his warriors. At any time may we go to the village where my father is chief, for Ja-don always will welcome the friends of his son. But for Tarzan to enter A-lur is another matter, though there is a way and he has the courage to put it to the test—listen, come close for Jad-ben-Otho has keen ears and this he must not hear," and with his lips close to the ears of his companions Ta-den, the Tall-tree, son of Ja-don, the Lion-man, unfolded his daring plan.

And at the same moment, a hundred miles away, a lithe figure, naked but for a loin cloth and weapons, moved silently across a thorn-covered, waterless steppe, searching always along the ground before him with keen eyes and sensitive nostrils.

3

Pan-at-lee

Night had fallen upon unchartered Pal-ul-don. A slender moon, low in the west, bathed the white faces of the chalk cliffs presented to her, in a mellow, unearthly glow. Black were the shadows in Kor-ul-JA, Gorge-of-lions, where dwelt the tribe of the same name under Es-sat,