else remembered that irrigation on Delmos III was accomplished that same way. And they recalled how it was done——

Voices went away in the ovenlike night outside. Bordman grimaced, and again said:

“Damn! Why didn’t I think of that myself?”

“Because,” said Aletha, smiling, “you aren’t a Doctor of Human History with a horse-raising husband and a fondness for ice cream. Even so, a technician was needed to break down the problem here into really simple terms.” Then she said, “I think Bob Running Antelope might approve of you, Mr. Bordman.”

Bordman fumed to himself.

“Who’s he? Just what does that whole comment mean?”

“I’ll tell you,” said Aletha, “when you’ve solved one or two more problems.”

Her cousin came back into the room. He said with gratification:

“Chuka can turn out silicone-wool insulation, he says. Plenty of material, and he’ll use a solar mirror to get the heat he needs. Plenty of temperature to make silicones! How much area will we need to pull in four thousand gallons of water a night?”

“How do I know?” demanded Bordman. “What’s the moisture-content of the air here, anyhow?” Then he said vexedly, “Tell me! Are you using heat-exchangers to help cool the air you pump into the buildings, before you use power to refrigerate it? It would save some power——”

The Indian project engineer said absorbedly:

“Let’s get to work on this! I’m a steel man myself, but——”

They settled down. Aletha turned a page.

The Warlock spun around the planet. The members of its crew [34] withdrew into themselves. In even two months of routine tedious voyaging to this planet, there had been the beginnings of irritation with the mannerisms of other men. Now there would be years of it. At the beginning, every man tended to become a hermit so that he could postpone as long as possible the time when he would hate his shipmates. Monotony was already so familiar that its continuance was a foreknown evil. The crew of the Warlock already knew how intolerable they would presently be to each other, and the foreknowledge tended to make them intolerable now.

[34]

Within two days of its establishment in orbit, the Warlock 

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