"Here's where you'll work until you die. How do you like it?"

MacVickers turned, scowling. It was hot. The room above was cool by comparison. The air was thick and sluggish with the reek of heated oil and metal. It was a big space, running clear to the curving wall, but the effect was of stifling, cramped confinement.

Machinery crammed the place, roaring and hissing and clattering, running in a circuit from huge intake pumps through meaningless bulking shapes to a forced-air outlet, with oil-pumps between them.

The pumps brought mud into a broad sluice, and the blue-green stain of it was everywhere.

There were two glassite control boxes high on the walls, each with a black, tentacled Europan. About five feet overhead was a system of metal catwalks giving complete coverage of the floor area. There were Europans on the walks, too, eight of them, patrolling steadily.

Their sleek, featureless bodies were safe from contact with the mud. They carried heavy plastic tubes in their tentacles, and there were heavy-duty shockers mounted at every intersection.

MacVickers grinned dourly. "Trustful lot."

"Very." Pendleton nudged him over toward a drive motor attached to some kind of a centrifugal separator. Loris and the blue-sheathed Earthman followed, with Birek coming slowly behind him.

MacVickers said, "What's all this for?"

Pendleton shook his head. "We don't know. But we have an idea that Jovium comes from the mud."