There were about a dozen Mercutians in the long laboratory, and each had a sun-tube dangling from his belt, ready at hand. The laboratory was crowded with apparatus, but what had drawn Hilary's attention was a gigantic gleaming metallic sphere set up prominently in the center of the room. Protruding from it at all angles were great quartz tubes, through which a blue light pulsed and flamed. It was connected by huge cables to a spark-bathed dynamo. Other cables writhed through the translucent ceiling. The weather machine!

Hilary took a firmer grip on his automatic, nodded once to Grim. The two Earthmen stepped simultaneously through the open door.

"Raise your paws high and keep them up." Hilary's voice cracked like a whip through the busy confusion of the laboratory. The Mercutians, scattered as they were, whirled around from their tasks to face two deadly weapons held by two determined-looking men.

There was a chorus of strange guttural oaths, but every hand moved skyward, reluctantly.


ilary picked out the most blasphemous sounding of the cursers, rightly deeming him the Cor in charge.

"You," he said, "what switches regulate the weather machine?"

The Mercutian Cor was a particularly ugly specimen. The gray warts were gigantic, hiding whatever semblance of manlike features there might have been beneath.

"I'll see you dogs burned to a cinder in the sun first," he growled.