The two men carried the top out of the baggage compartment and set it up.

"Thank God I came in time," Cliff hissed. "How long have we got, Kay?"

"Five minutes, I think," Kay answered, glancing at the oncoming wall. "They're slow. Will it work, Cliff? God, when I found you'd gone last night—"

Cliff did not answer. Ignoring Kay's offer of assistance, he fitted the top tightly into its socket of craolite, much heavier than the former one. Beneath this, three heavy craolite legs formed a sort of tripod.

"I looked forward to this possibility, Kay," said Cliff, as he adjusted the top and turned the clamps that held it in position. "Sorry I had to deceive you, but you we're so set on the cosmic rays, and I knew the psenium emanations wouldn't appeal to you. You wouldn't have believed. I had a hunch Ruth would draw one of those numbers.... How long?"

The swaying masses of gray jelly were very near them. Cliff worked feverishly at the top.

"Let me help. Cliff!"

"No! I'm through! Stand back!" shouted Cliff.