"No reason," Rick admitted. "It was just that it hadn't occurred to me. There's one difficulty, though. I have only two pairs of glasses with infrared-sensitive lenses. So only two of us could go."
"Only two could dive with the camera," Tony corrected. "But all of us could go. Two would remain on the surface, with the floats, in case of trouble."
"Who would dive and who would stay on the surface?" Scotty demanded.
Rick produced a quarter. "Let coins decide. Except for the professor. He thought of it, so he dives."
"Fair enough," Scotty agreed. "All right with you, Tony?"
"Of course. The three of us, then. Odd man goes with Hobart."
Tony and Scotty produced coins. With Rick, they walked into the living room and lighted a kerosene lamp.
"Now," Rick said, and tossed his coin, catching it in the palm of his hand and slapping it onto his other wrist. Tony and Scotty followed suit. Rick uncovered first. He had heads. Tony uncovered and displayed a tail.
Scotty groaned. "Shucks! I lose. It's one of you."
Rick held his breath as Scotty uncovered—another tail! He turned to Zircon. "We dive, while Scotty and Tony stay topside."