“Maybe there’s a dusty rain tank somewhere near an outdoor fireplace,” Pete said wryly. “Face it, fellows, it’s gibberish! It doesn’t mean anything!”

“Why would my great-great-grandfather have written something that meant nothing?” Diego demanded.

“He wouldn’t have,” Jupiter said. “But… Ashes, Dust, Rain, and Ocean?” He shook his head. “I confess I don’t understand the connection at all.”

“Maybe,” Bob said, “Don Sebastián didn’t write the words. Maybe they were written earlier by someone else.”

“I don’t think so, Records. Don Sebastián would have left some message for José, I’m convinced of that, and the paint was right beside him,” Jupiter said. “And it’s unlikely that someone wrote the words after his death. If anyone had come in here later, he’d have found the four bodies and reported them, and we wouldn’t have found the skeletons. No, I’m certain that Don Sebastián wrote those words. But — ”

“Maybe he was delirious, First,” Bob said. “He was hurt bad, dying. Maybe he didn’t even know what he was writing.”

Jupiter nodded. “That’s possible, yes. But, somehow, I feel the words do mean something, taken all together. Something that Don Sebastián knew José would understand. Ashes… Dust… Rain… Ocean.”

The words seemed to echo through the hidden cave. The boys repeated them in their minds, as if hearing them over and over would reveal their secret. Concentrating hard, they were slow to notice a strange noise coming into the cave.

“Jupe!” Diego suddenly exclaimed. “What’s that? That tapping noise? Up there!” He looked up towards the roof of the cave.

“Outside!” Bob said softly. “Footsteps! Someone’s up on Condor Castle!”

“Maybe it’s those three cowboys,” Diego said.

“If it is,” Jupiter said, “they won’t find us. We’ve got the entrance to the cave blocked.”

“Our tracks!” Pete said in alarm. “If they spot our tracks in the mud, they’ll know we came down here! They can push those stones away from the hole if they try! Then they can — ”

“Come on,” Jupiter ordered.

The four boys hurried across the cave to the narrow passage and crawled back out into the smaller chamber. They crouched on either side of the blocked-up opening and waited in the dark. Soon they heard faint voices outside.

“They’re coming down,” Pete hissed.

The voices outside became louder, and then the boys could hear faint steps slipping and sliding down the steep ridge.

“Stay flat back against the wall on each side of the hole,” Jupiter instructed. “If they do push the rocks in, and come inside, maybe they won’t see us right away. When they’ve gone past us, we can make a dash for outside.”

The sharp sound of boot heels striking stone rang above them. The voices were almost directly in front of the covered hole now! Three voices with fierce, arguing tones!

“What are they saying?” Bob whispered. “I can’t make out the words.”

“Neither can I,” Pete whispered back.

The boys strained to hear. The angry voices seemed to be right in front of the blocked hole, yet they were oddly muffled.

“Why don’t they try to come in?” Diego wondered.

“They must have seen our tracks,” Pete whispered, “or why would they come straight down to the hole?”

In the dark cave the four boys waited in an agony of suspense.

“They’ve been out there ten minutes,” Bob finally whispered.

Time seemed to stand still in the cave.

“Fifteen minutes,” Bob said. “What are they — ”

Boots moved out beyond the thin barrier of rocks that covered the hole! Footsteps slipped and slid — and the voices faded away! The three men were gone!

In the small cave, the boys waited another fifteen minutes.

“They didn’t see the hole!” Diego exclaimed at last.

“They missed us!” Bob echoed.

“But,” Pete said, “they must have followed our tracks down. How could they miss the hole? Even if it’s dark out there now?”

Jupiter stared at the rocks that covered the hole. “And why couldn’t we hear words? We should have been able to hear what they said if they were right outside.”

For a moment, none of them spoke in the dark cave.

“Guys,” Pete said at last, “pull out some of the rocks.” Bob turned on his torch and propped it on a boulder. Then the four boys pulled out one of the large rocks they had rolled against the hole. Then they pulled out another. And a third.

There was no light or fresh air from outside.

Frantically, they removed all the rocks they had pushed into the entrance to the hidden cave.

No light, no wind, and no rain came in.

“Where is it?” Diego cried. “The entrance?”

Pete crawled into the dark space they had opened, and felt around at the end.

“Rock!” his muffled voice came back. “It’s all rock!”

“You mean they blocked it up!” Bob cried, pale.

Pete crawled slowly out. His eyes were wide. “No, they didn’t block it up. There’s been another mudslide! A big slab of rock has slipped down over the hole. That’s why those guys didn’t see the hole — there isn’t any hole out there now! And that’s why we couldn’t hear them clearly! Now what do we do? We’re trapped in here!”

Jupiter said quietly, “Are you sure, Second? Perhaps it’s not that big a rock. Let’s see if we can move it.”

The four boys managed to squeeze into the narrow space of the old entrance hole. Pete counted to three, and they all heaved at the rock that had slipped across the opening.

“Ooofff!” Pete grunted.

“Owww!” Diego’s feet slid out from under him and he fell.

Bob and Jupiter pushed with all their strength.

The rock didn’t even move a millimetre.

“It’s no use, First,” Bob wailed.

“We might as well try to move the whole ridge,” Pete added.

They crawled back out of the hole and sat glumly on the floor of the cave.

“There’s no reason to panic,” Jupiter said calmly. “Even if we can’t get out right away, our families will be looking for us by tomorrow morning, and Pico can tell them about Condor Castle. We couldn’t hear words, but we heard the voices out there okay, so we’ll hear searchers and they’ll hear us.”

“Well,” Bob said ruefully, “I guess our folks are kind of used to emergencies by now.”

Pete groaned. “You mean we’re going to stay here all night?”

“If we must,” Jupiter said cheerfully. “It’s not a bad cave. We’re nice and dry, and there’s plenty of air in here. As a matter of fact, I noticed the good air when we first came in. Since the entrance was buried a long time, there must be holes or cracks in the rock to let in air. In fact, there might be some other way out. I suggest we start looking for one right now.”

“I agree with Jupiter,” Diego said. “And if we keep moving, we’ll stay warmer.”

While Bob shone his torch slowly all around, Jupiter, Diego and, Pete studied the walls and ceiling of the small outer cave. They found no other way out.

“But the wall over here to the left of the blocked entrance seems to be dirt,” Jupiter said, “and it’s kind of damp. We might be able to dig our way out of here.”

“If we had the right tools, which we don’t,” Pete pointed out. “Besides, the wall curves inwards over there. No telling how thick it is.”

Jupiter nodded. “I suggest we go back into the large cave first, and see if we can find an alternative exit.”

“We searched all over in there, First,” Bob objected.

“True, but let’s try again. Anyway, I want to take another look at those words Don Sebastián wrote.”

He led them back through the narrow passage into the cave with the skeletons. The skulls leered ominously at the boys, seeming to mock them. With Bob holding the flashlight again, the boys worked slowly all around the walls of the larger cave. There were definite currents of air from somewhere but no exits.

“I guess it’s stay and wait for help,” Bob said, “or dig back in the small cave.”