Wall eyed Hopper coldly. “I think he said, a few moments ago, that he fcad fulfilled your commission also.”

“With that?” The big shot pointed to the machine. “Does that look like a stereoscopic screen?”

Gallegher said, “Get me an ultraviolet, Narcissus. Fluorescent.” He went to the device, praying that his guess was right. But it had to be. There was no other possible answer. Extract nitrogen from dirt or rock, extract all gaseous content, and you have inert matter.

Gallegher touched the switch. The machine started to sing “St. James Infirmary.” Commander Wall looked startled and slightly less sympathetic. Hopper snorted. Smeith ran to the window and ecstatically watched the long tentacles eat dirt, swirling madly in the moonlit pit below.

“The lamp, Narcissus.”

It was already hooked up on an extension cord. Gallegher moved it slowly about the machine. Presently he had reached the grooved wheel at the extreme end, farthest from the window.

Something fluoresced.

It fluoresced blue—emerging from the little valve in the metal cylinder, winding about the grooved wheel, and piling in coils on the laboratory floor. Gallegher touched the switch; as the machine stopped, the valve snapped shut, cutting off the blue, cryptic thing that emerged from the cylinder. Gallegher picked up the coil. As he moved the light away, it vanished. He brought the lamp closer—it reappeared.

“Here you are, commander,” he said. “Try it.”

Wall squinted at the fluorescence. “Tensile strength?”