"That sounds good," Casker admitted, thinking that Hellman might not be so stupid after all. "This should tell us once and for all if their meat _is_ our meat," Hellman said. "This Voozy seems to be the closest thing to a universal drink I've found yet." "Maybe," Casker said hopefully, "maybe it's just plain water!" "We'll see." Hellman pried open the lid with the edge of the burner. Within the vat was a crystal-clear liquid. "No odor," Casker said, bending over the vat. The crystal liquid lifted to meet him. Casker retreated so rapidly that he fell over a box. Hellman helped him to his feet, and they approached the vat again. As they came near, the liquid lifted itself three feet into the air and moved toward them. "What've you done now?" Casker asked, moving back carefully. The liquid flowed slowly over the side of the vat. It began to flow toward him. "Hellman!" Casker shrieked. Hellman was standing to one side, perspiration pouring down his face, reading his dictionary with a preoccupied frown. "Guess I bumbled the translation," he said. "Do something!" Casker shouted. The liquid was trying to back him into a corner. "Nothing I can do," Hellman said, reading on. "Ah, here's the error. It doesn't say 'Everyone drinks Voozy.' Wrong subject. 'Voozy drinks _everyone_.' That tells us something! The Helgans must have soaked liquid in through their pores. Naturally, they would prefer to be drunk, instead of to drink." Casker tried to dodge around the liquid, but it cut him off with a merry gurgle. Desperately he picked up a small bale and threw it at the Voozy. The Voozy caught the bale and drank it. Then it discarded that and turned back to Casker. Hellman tossed another box. The Voozy drank this one and a third and fourth that Casker threw in. Then, apparently exhausted, it flowed back into its vat. Casker clapped down the lid and sat on it, trembling violently. "Not so good," Hellman said. "We've been taking it for granted that the Helgans had eating habits like us. But, of course, it doesn't necessarily--" "No, it doesn't. No, sir, it certainly doesn't. I guess we can see that it doesn't. Anyone can see that it doesn't--" "Stop that," Hellman ordered sternly. "We've no time for hysteria." "Sorry." Casker slowly moved away from the Voozy vat. "I guess we'll have to assume that their meat is our poison," Hellman said thoughtfully. "So now we'll see if their poison is our meat." Casker didn't say anything. He was wondering what would have happened if the Voozy had drunk him. In the corner, the rubbery block was still giggling to itself. * * * * * "Now here's a likely-looking poison," Hellman said, half an hour later. Casker had recovered completely, except for an occasional twitch of the lips. "What does it say?" he asked.