"Then it really is our jewels she was talking about."

Stairs cut a white tunnel into the wall before them, and they mounted upward, coming finally to another corridor. They turned down it and for the first time saw recognizable doors in the wall. "Hey," said Iimmi, "maybe one of these goes outside."

"Fine," said Geo. "This place is beginning to get me." He pushed open a door and stepped in. Except for the flowing white walls, it duplicated in miniature the basement of the New Edison building. Twin dynamos whirred and the walls were laced with pipes.

"Nothing in here," said Iimmi.

They tried a door across the hall now. In this one sat a white porcelain table and floor to ceiling cases of glittering instruments. "I bet this is the room your arm came off in," Iimmi said.

"Probably," replied Geo.

They came out and continued even farther. In the next room the glow was dimmer, and there was dust on the walls. Iimmi ran his finger over it and looked at the gray crescent left on the bleached flesh.

Two huge screens leaned out from the face of a metal machine. A few dials and a glass meter hung beneath each two yard rounded-rectangle of opaque glass. In front of each was a stand which held something like a set of binoculars and what looked like a pair of ear muffs.

"I bet this place hasn't been used since before these girls went blind," said Geo.

"It looks it," Iimmi said. He stepped up to one of the screens, the one with the fewer dials on it, and turned a switch.