The smell of molten elgeron was heavy now, and the bite of ammonia. The robots were coming back up the ramp, carrying enormous chunks of the solidified, translucent stuff. On Mars, it would be crushed in the huge, automatic grinders and mixed with the stydium of that planet, and sent in radiation-proof ships to the laboratories of Earth.

One robot seemed to falter for a second, and I glanced quickly back toward the cabin where I could just see Van at the control board. I couldn't tell by his manipulation of the toggles whether the robot's falter was deliberate or not, but I saw him glance at Collins and smile.

Rage simmered in me, pulsated, and I stood there for seconds in the viewing room, waiting for it to recede. The whole line of robots was stationary now and the one who'd faltered was leaning over against the guard rail of the ramp.

I came into the cabin and said, "You'd better put on your suit, Van. There's a robot out there holding up the line."

Jupiter was no place to venture without proper radiation shielding, and our space suits weren't the best in the world for radiation protection.

He said, "I think I can handle it from here, Chief."

Horse said quickly, "I'll go out and see what I can do. No sense in taking a chance on jamming the whole line, Van." Collins glanced at me for confirmation.

I shrugged. "Suit yourself. But remember—I didn't order you out."

"Unless you'd like to go, Chief," Horse said meaningfully.

I shook my head. I flushed, too, though there wasn't any reason for it. Unnecessary risks are not a part of a pilot's job.