He caught himself up sharply. Letting his sympathies run away with him wasn't going to do anybody any good. The only thing that concerned him was to get hold of that sun-stone again and get out of this devil's pocket. He'd spent half a life hunting for a stone, and he wasn't going to let concern over perfect strangers sidetrack him now.

The first step would be getting away from the cave.

It would have to be at night. No watch was kept then on the ledges, for the hawks did not fly in darkness, and the Korins never moved without the hawks. Most of the people were busy in those brief hours of safety. The women searched for edible moss and lichens. Some of the men brought water from the stream at the canyon fork, and others, with stone clubs and crude spears, hunted the great rock-lizards that slept in the crevices, made sluggish by the cold.

Trevor waited until the fourth night, and then when Saul's water party left, he started casually out of the cave after them.

"I think I'll go down with them," he told Jen and Hugh. "I haven't been down that far since I got here."

There seemed to be no suspicion in them of his purpose. Jen said, "Stay close to the others. It's easy to get lost in the rocks."

He turned and went into the darkness after the water party. He followed them down to the fork, and it was quite easy then to slip aside among the tumbled rock and leave them, working his way slowly and silently downstream.

After several days in the dimness of the cave, he found that the star-shine gave him light enough to move by. It was hard going, even so, and by the time he reached the approximate place where Saul had tried to kill him he was bruised and cut and considerably shaken. But he picked his spot carefully, crossed the stream, and began to search.

The chill deepened. The rocks that had been hot under his hands turned cold, and the frost-rime settled lightly on them, and Trevor shivered and swore and scrambled, fighting the numbness out of his body, praying that none of the loose rubble would fall on him and crush him. He had prospected on Mercury for a long time. Otherwise he would not have lived.