Sanderson--or Callahan--shrugged impatiently. "Let's have it. This is the only way left. I wouldn't have given myself away if it hadn't been necessary. You'd never have suspected me ... let's have it!" Silently Vanning handed over the make-up kit. Lysla had lifted her head to watch Callahan out of wondering eyes. Hobbs was chewing his lip, scowling in amazement. Zeeth was the only one who did not look surprised. But even he lost his impassivity when Callahan began to use the make-up kit. It was a Pandora's box, and it seemed incredible that a complete disguise could issue from that small container. And yet-- Callahan used the polished back of it as a mirror. He sent Lysla for water and containers, easily procurable elsewhere in the building, and mixed a greenish paste which he applied to his skin. Tiny wire gadgets expanded his mouth to a gaping slit. Artificial tissue built up his face till his nose had vanished. _Isoflex_ was cut and moulded into duplicates of the Swamja's bulging, glassy eyes. Callahan's fingers flew. He mixed, painted, worked unerringly. He even altered the color of his garments by dousing them in a dye-solution, till they had lost the betraying red tint that betokened a slave. In the end--a Swamja stood facing Vanning! "All right," Callahan said tiredly. "I'll pass--if we keep out of bright lights. Now go out and help Lysla do guard duty. I'm going to disguise you all. That'll help." Vanning didn't move as the others left. Callahan took an oilskin packet from his belt and held it out. "Here's the treaty. I suppose you came after that." The detective opened the bundle and checked its contents. He nodded. It was the vital treaty, which would have caused revolution on Callisto. Slowly Vanning tore it into tiny shreds, his eyes on Callahan. It was difficult, somehow, for him to find words. The other man shrugged. "That's that. And I suppose you'll be taking me back to Earth--if we get out of this alive." "Yeah," Vanning said tonelessly. "Okay." Callahan's voice was tired. "Let's go. We haven't time to disguise everybody--that was just an excuse to give you the treaty. A private matter--" He shuffled to the door, with the lumbering tread of the Swamja, and Vanning followed close at his heels. The others were waiting. Vanning said, "Okay. Let's start. No time to disguise ourselves. Stay behind--" * * * * * In a close group the five moved along the avenue, Callahan in the lead. The outlaw's disguise was almost perfect, but nevertheless he did not trust to it entirely. When possible, he moved along dimly-lighted streets, the four others keeping close to his heels. Once a patrol of Swamja guards passed, but at a distance. "I'm worried," Callahan whispered to Vanning. "Those creatures have--different senses from ours. I've a hunch they communicate partly by telepathy. If they try that on me--"