He was encouraging her, of course. But he wasn't being patronizing. Frost tingled in his nerves. He wanted to know her version.

"I'll show you the little museum we have," she replied, her eyes widening slightly. "This is probably old hat to you—but it's weird—it gives you the creeps..."

He followed her along a covered causeway to another dome. In a gallery there, a series of dry specimens were set up, inside sealed boxes made of clear plastic.

The first display was centered around a tapered brass tube—perhaps one of the barrels of an antique pair of fieldglasses. Wrapping it was a spiny brown tendril from which grew two sucker-like organs, shaped like acorn tops. One was firmly attached to the metal. The other had been pulled free, its original position on the barrel marked by a circular area of corrosion. The face of the detached sucker was also shown—a honeycomb structure of waxy vegetable tissue, detailed with thousands of tiny ducts and hairlike feelers.

"Some settler dropped the piece of brass out on a trail in Syrtis Major," Nance explained. "Later, it was found like this. Brass is something that people have almost stopped using. So, it was new to them. They wouldn't have been interested in magnesium, aluminum, or stainless steel anymore. The suckers aren't a usual part of them either. But the suckers grow—for a special purpose, Dr. Pacetti believes. A test—perhaps an analysis. They exude an acid, to dissolve a little of the metal. It's like a human chemist working. Only, perhaps, better—more directly—with specialized feelers and sensing organs."

[p. 125]

Nance's quiet voice had a slight, awed quaver at the end.

Frank Nelsen nodded. He had examined printed pictures and data before this. But here the impact was far more real and immediate; the impact of strange minds with an approach of their own was more emphatic.

"What else?" he urged.

They stood before another sealed case containing a horny, oval pod, cut open. It had closed around a lump of greenish stone.