I raised my eyebrows. "Really? I'd be interested in seeing this junk, Anders."

"Oh, yes, sir. Right this way, sir. Watch out for these rungs, they're slippery."

I ascended the retractable metal rungs that jutted from a point between the tailfins to the open airlock, twenty feet over ground level, and followed Anders inside the ship.

I trailed Anders through the ship, from the pilot's compartment—a bewildering mass of dials, switches, signal lights and wire—through the galley into the troop section. It was a cramped cubicle housing a number of nylon-webbed foam rubber bunks. The bunks were empty, but I looked them over anyhow. I carefully tugged back the canvas covering that fitted envelope-fashion over a foam rubber pad, and ran my finger over the surface of the pad. It came away just slightly gritty.

"Uh-huh!" I said, smiling. Anders just stared at me.

I turned to the storage lockers. "Let's see this junk they were suddenly deprived of."

Anders, after a puzzled frown, obediently threw open the doors of the riveted tiers of metal boxes along the rear wall; the wall next to the firing chambers, which I had no particular desire to visit. I glanced inside at the articles therein, and noted with interest their similarity.

"Now, then," I resumed, "the thrust of this rocket to get from Mars to Earth is calculated with regard to the mass on board, is that correct?" He nodded. "Good, that clears up an important point. I'd also like to know if this rocket has a dehumidifying system to keep the cast-off moisture from the passengers out of the air?"

"Well, sure, sir!" said Anders. "Otherwise, we'd all be swimming in our own sweat after a ten-hour trip across space!"

"Have you checked the storage tanks?" I asked. "Or is the cast-off perspiration simply jetted into space?"