"Sun!" he repeated gratefully. Next he indicated the third little circle from the center.

"This world?" he said.

"Earth," said the young man.

"Earth? This world is Earth?"

"Yes."

Blumberg grumbled: "What is this—a joke?"

He could not understand Blumberg. Eagerly he looked into the face of the pale young man, and indicated the fourth little circle.

"Mars," said Edgar.

"Mars!" he cried jubilantly. He pointed his finger at himself. "I am man of Mars," he said.

There was silence in the room, while they both stared at him. Then the big man began to laugh. His body shook, and his red cheeks jumped up and down.