He played the flash around. He was still in the cavern, though the panel of sunstones had slid back down between the tables. The green lamps had all been covered; he pulled the shields off several to make a softly lit path to the stairway. He ran up the steps, exposing lights as he went. At the top, the elliptical door was closed, and it would not open for him, even when he touched it with the sunstone. Someone had locked it.
The caretakers, of course. They couldn’t take his stone, but they could lock the stranger into the cavern and let him die there. He wondered what they had said to Rekari to make him cooperate.
He went back down to the cavern.
He stalked through the room, taking the shields off all the lights. Then he hitched himself up on one of the tables and looked around. The elliptical door had been buried. It was obviously an ancient entrance to this cavern, no longer used. But the caretakers had to get in and out somehow, if only to replenish the lamps. He made a circuit of the room, but it seemed to be completely sealed. He licked a finger and held it up, searching for a breeze, but there was nothing noticeable.
He curled his hand around the sunstone and spoke in his most formal and respectful Martian. “Venori,” he said, “my elder who chose my father to be his son, tell his son how to leave this place.”
He thought he could hear a faint whisper, like a broom sweeping a wooden floor. And then his own vision turned dark again, except for one small spot on his right, and when he turned toward it, he felt as if he was looking down a long, narrow tunnel that ended at a circle low on the cavern wall. He slid off the table and walked toward the circle, stumbling once because he couldn’t see the floor beneath his feet, and though the spot remained as bright as Phobos, it shrank before him until, at the wall, it was no larger than the sunstone that hung about his neck. It stood at knee height, and when he bent close to it, he saw nothing special to mark it. He touched it with one finger, and when nothing happened, he pressed the sunstone to it.
The darkness in his vision cleared away as the wall opened into an ellipse, its stone quarters withdrawing into the walls just as the metal segments of the ellipse at the top of the stairs had done. Beyond was a stairway upward, lit by more green lamps. Dave climbed. At the top was another stone wall, and his vision shrank again, for just a moment, to show him where to press the sunstone to it. When that wall opened, late-afternoon daylight invaded the stairwell.
Dave stepped out. He found himself in the clump of boulders that stood at the far end of the nettle-free area; two of them had slid aside to allow him to pass, and as he emerged, they closed up behind him.
Outside, Rekari and the two caretakers sat atop one of the other boulders. Rekari jumped down to embrace Dave. “I knew you could do it.”
“So it was a test,” said Dave.
Rekari made the sign of agreement, twice.
“And what if I had failed?”
Rekari held him at arm’s length and looked into his face. “If two days had passed and you had not found the way, I would have gone back and brought you out. But I knew you would not fail. I knew when you opened the first door that the elders had accepted you.”
Dave turned back to the place where the boulders had parted to let him out. There was no way to tell that anything had happened there, but he knew he could open it again at any time. “My father has suggested that I could become famous by revealing the cavern to the people of Earth. On Earth, many such places have been visited by scholars and tourists. Caves at Altamira and Lascaux. Graves in Greece. The pyramids of Egypt. Sacred places. I visited a few of them myself when I was in school there.”
The caretakers glanced at each other. “And will you do this?” said one of them.
Dave fingered the sunstone at his neck. He looked at Rekari. “The people who made those places on Earth are long gone. The people who made this place on Mars are still here. What would the elders say if I stole it from them?” He made the sign of the negative. “The elders will help me find the ruins of cities where no one has lived for twenty thousand years. That is the proper work of archaeologists, not helping to despoil what has not been abandoned. There will be enough other places to make my reputation.”
Rekari gripped Dave’s arm. “Your father will be pleased. I know it.”