"Maybe it can help, Dad ... maybe it can," Terry said, and he continued the prying. Mike pulled at it, and there were louder squawks as the nails protestingly surrendered.

Doug wanted to stop them, to tell them, but there could be such a little time left, and if it kept them busy there might not be time for them to become afraid.

He watched them as they ripped the top from the crate, eagerly began hauling out its contents.

Four large, wide-bladed fans, each perhaps sixteen inches in diameter, and each driven by a compact electric motor. They were coaxially mounted on tall, slender chromium plated racks and could be adjusted on them to meet any conceivable experiment in ventilation engineering.

Doug said nothing, let them continue. It might not even be necessary to tell them that their discovery was nothing more than two ingeniously designed air conditioning units.

He wondered why they had come at all. The Prelatinate-Attorney's idea, perhaps, of a not-too-subtle jest. That, or even a veiled warning.

There was more squawking of wood, and in a few moments Mike and Terry had each of the units placed beside each other on the cellar floor.

"There's other junk here too," Terry was saying. "Pulleys and stuff, Dad. And a sheet of directions or something. Here, look Dad ... maybe it'll help."

Doug looked at the smudged sheet of plastisheet that Terry had thrust in his hand. Only simple diagrams, indicating the use and assembly of the pulleys for desired variations in blower speeds. Even the simple rheostat, Doug mused, was taboo....

He crumpled the sheet, let it fall to the floor.