"Hundreds of years ago — at the time of the Spanish conquest of Mexico," explained the old Mayan. "My ancestors who settled the valley were a clan of the highest class Mayans, the royalty. They fled from the Spanish soldiers to this valley. We have been here since, satisfied, as I said, to exist without the rest of the world."

Doc, reflecting on the turmoil and bloodshed and greed that had racked the rest of the world in the interim, could not but agree that the course these people had taken had its merits. They might be without a few conveniences of modern homes, but they probably didn't miss them.

Elderly King Chaac spoke up unexpectedly: "I know why you are here, Mr. Savage."

"Eh?"

"Your father sent you. It was agreed that upon the passage of twenty years, you were to come to me. And I was to be the judge of whether or not to give you access to the gold which is of no value to we of the Valley of the Vanished."

Lights of understanding flickered in Doc's golden eyes. So this had been the text of the remainder of that letter, the burned first portion of which he had found in his father's robbed safe!

It was all plain now. His father had discovered this lost valley with its strange inhabitants and its fabulous hoard of gold. He had decided to leave it as a legacy to his son. He had secured possession of the land inclosing the Valley of the Vanished. And he had made some arrangement with King Chaac. The thing to do was to find out what kind of arrangements!

Doc put the inquiry: "What sort of an agreement did my father have with you?"

"He did not tell you?" the old Mayan asked in surprise.

Doc lowered his head. Slowly, he explained his father had died suddenly. The elderly Mayan maintained a reverent silence for a time alter he heard the sad news. Then he outlined the business aspects of the gold deal.

"You will necessarily give a certain portion to the government of Hidalgo," he said.

Doc nodded. "The agreement is one fifth to the government of Hidalgo. That is eminently fair. The President of Hidalgo, Carlos Avispa, is a fine old gentleman."

"A third of all gold removed is to be placed in a trust fund in the name of my people," explained King Chaac. "You are to establish that fund and see that suitable honest administrators are appointed. The other two thirds you are to have, not to build up a personal fortune, but to spend as you see fit in furthering the work in which your father was engaged — in righting wrongs, relieving the oppressed, in benefiting mankind in every way possible."

"A third to your people don't seem like a very big percentage," Doc suggested.

King Chaac smiled. "You will be surprised at the sum it will come to. And we may never need it. This Valley of the Vanished, you understand, remains just as it is — unknown to the world. And the source of this gold will also be unknown to the world."

Johnny, twiddling his glasses which had the magnifying lens on the left side, had been an interested listener to all this. Now he broke in with a puzzled query.

"I noticed the nature of the rock about here," he said. "And, although the pyramid is made of high-grade gold ore, there is no sign of quantities of the rock near by. If you're figuring on giving us the pyramid, will your people stand for it?"

"The pyramid remains untouched!" There was a sharpness in King Chaac's voice. "That is our shrine! It shall stand always!"

"Then where is the gold?"

King Chaac turned to Doc. "You will be shown to it within thirty days — or sooner, if I decide it is time. But until then, you will know no more."

"Why this condition?' Doc inquired.

There seemed the slightest of twinkles in the old Mayan's eyes as he retorted: "That I do not care to disclose."

Throughout the entire confab, pretty Princess Monja had been standing to one side. And almost the whole time, she had been watching Doc, a strange, veiled expression in her eyes.

"I wish she'd look at me like that!" Monk confided to Ham.

King Chaac's declaration of the thirty-day moratorium on all information concluded the interview. He gave orders to his followers that Doc and his men should be treated with the best.

Doc and his men spent the remainder of the day making friends with the Mayans. They did little tricks of magic that highly entertained the simple people. Long Tom with an electrical shocking apparatus he rigged up, and Monk with some chemical displays, were the favorites.

Morning Breeze and his warriors, however, kept severely aloof. They were often seen chatting in surly groups.

"They're gonna give us trouble," Renny declared, playfully cracking soft rocks with his ironlike fists to awe and amuse a young Mayan.

Doc agreed. "They're more ignorant than the others. And this devil who is behind the Hidalgo revolution is a nabob in the sect of fighting men. He's going to send the Red Death on the tribe before long."

"Can't we stop it? That infernal Red Death, I mean?"

"We can try," Doc said seriously. "But I'm doubtful that we can do much until it strikes. We don't even know how they spread it, much less what the cure is."

"Maybe if we got them the gold in the form of a bribe so they wouldn't inflict this Red Death — "

"That would mean the success of the Hidalgo revolt, and hundreds of people killed, Renny!"

"That's right," Renny muttered soberly.

For sleeping quarters, they were allotted a many-room house not a great distance from the gleaming golden pyramid.

They turned in early. The night gave promise of not being as chilly as they had expected it to be up here in the mountains.

The following day was devoted to nothing more glorious than killing time. Exhibiting little tricks soon palled. So Doc and Renny set out to explore the Valley of the Vanished.

They found it as much a prison as a fortress. The narrowest of paths chiseled into the sheer gorge side was the only route out, afoot. And by air, nothing except a seaplane could land. No dirigible could withstand those terrific air currents.

The sides of the valley were in cultivation, growing vegetables and many milpa patches. There was cotton, and domesticated, long-haired goats, for clothing. Jungle growth was rank everywhere else.

"They're pretty well fixed," Doc remarked. "Not fancy. But you couldn't want more."

Strolling back to the little city beside the golden pyramid, Doc and Renny encountered the attractive Princess Monja Obviously, she had maneuvered this meeting. She was, it could plainly be seen, greatly taken with the handsome Doc. This embarrassed Doc no little. He had long ago made up his mind that women were to play no part in his career. Anyway, his was not a nature to easily lend itself to domestication. So he answered Princess Monja's eager patter in monosyllables, and carefully avoided being led into discussions about how pretty American girls were in comparison to, well — Monja, for instance.

It was not an easy course to take. Monja was one of the most ravishing young women Doc had ever encountered.

Back at the city, they could not help but notice a subtle change in the attitude of many of the Mayans. Even those who were not of the red-fingered sect now looked at Doc and his friends with unfriendly eyes.

The red-fingered warriors were mingling with the populace, doing a lot of taking.

Doc chanced to overhear one of these conversations. It told him what was happening. The red-fingered men were poisoning the minds of the other Mayans against the whites. Doc and his men, the warriors claimed, were pale-skinned devils that had ridden here like worms in the innards of the great blue bird that landed on the water. And so, as worms, they should be destroyed.

It was clever work on the part of the red-fingered ones. Doc went away thoughtful.