They looked at each other and jabbered some more.

"Look," he said, "Earth. E-A-R-T-H, Earth." He pointed upward, described a large circle, then another smaller, and showed how Earth revolved around the sun.

One of the men poked him with a stick, or tube of some kind. It did not hurt, but angered him. He left the chains by his own method of travel, and reappeared behind the two men. They stared at the place where he had been. The chains tinkled musically. He grasped the shoulder of the offender, spun him around and slapped his face.

A cry of consternation rose from the group, echoing in the high ceilinged cavern. "SBTL!" it said, "ZBTL ... XBTL ... zbtl."

The men instantly prostrated themselves before him. The one who had poked Stinson with the stick rose, and handed it to him. Still angered, Stinson grasped it firmly, with half a notion to break it over his head. As he did so, a flash of blue fire sprang from it. The man disappeared. A small cloud of dust settled slowly to the floor.

Disintegrated!

Stinson's face drained pale, and suddenly, unaccountably, he was ashamed because he had no clothes.

"I didn't mean to kill him!" he cried. "I was angry, and...."

Useless. They could not understand. For all he knew, they might think he was threatening them. The object he had thought of as a stick was in reality a long metal tube, precisely machined, with a small button near one end.

This weapon was completely out of place in a culture such as this. Or was it? What did he know of these people? Very little. They were humanoid. They had exhibited human emotions of anger, fear and, that most human of all characteristics, curiosity. But up to now the tube and the chain was the only evidence of an advanced technology, unless the ancient inscriptions in the stone wall of the pool, and the statues lining the wall were evidences.