He leaned forward to fill in the necessary form. Since it was cheaper to transport a normal human than to rig special environments in a spaceship, every planet operated its own conversion chambers. On the space freighter that carried him from Earth Asa Graybar was confined to a small cabin that was opened only for a guard to bring meals and take out dirty dishes. He was still a prisoner. Sometimes he could hear voices in the passageway outside, and once one of them sounded like a woman's. But since women neither served on spaceships nor worked in the dome settlements on harsher worlds, he decided it was his imagination. He might have been dead cargo for all he learned about space travel. Nevertheless his time was not wasted. He had as a companion, or cellmate, another convict who had elected conversion to muck man. More important, his companion had done time on Jordan's Planet before and had wanted to return. "It's the Slider eggs," explained Kershaw, the two-time loser. "The ones you see on Earth knock your eyes out, but they've already begun to die. There's nothing like a fresh one. And I'm not the first to go crazy over them. When I was reconverted and got home I had nine thousand dollars waiting for me. That'll buy a two-year-old egg that flashes maybe four times a day. So I stole a new one and got caught." Asa had held a Slider egg in his hand as he gazed into it. He could understand. The shell was clear as crystal, taut but elastic, while the albumen was just as clear around the sparkling network of organic filaments that served as a yolk. Along these interior threads played tiny flashes of lightning, part of some unexplained process of life. Electrical instruments picked up static discharges from the egg, but the phenomenon remained a mystery. Hardly anyone faced with the beauty of a Slider's egg bothered to question its workings. For a few expectant moments there would be only random, fitful gleamings, and then there would be a wild coruscation of light, dancing from one filament to the next in a frenzy of brilliance. It took about four years for a Slider egg to die. Beauty, rarity and fading value made the eggs a luxury item like nothing the world had ever seen. If Asa had found a means of keeping them alive it would have made him wealthy at the expense of the Hazeltyne monopoly. "You know what I think?" Kershaw asked. "I think those flashes are the egg calling its momma. They sparkle like a million diamonds when you scoop one out of the muck, and right away a Slider always comes swooping out of nowhere at you." "I've been meaning to ask you," Asa said. "How do you handle the Sliders?" Kershaw grinned.