"You were here an hour ago to bid me hello. We enjoyed our reunion immensely and affectionately. Then you said you were going home to change your suit--which you have done. Now you come in, acting as though this were the first time you'd seen me since Tony and I took off for Titan three months ago." Cal growled in his throat. "What did you say?" asked Tinker. "Benj." "Benj! Oh no!" "I haven't been here before. He's my ... my--" "I know," said Tinker softly, putting a hand on his. "But no one would dream of masquerading as anyone else. That's unspeakable!" "It's ghastly! The idea is beyond revolting. But, Tinker, Benj Blair is revolting--or worse. We hate each other--" "I know." Tinker shuddered and made a face that might have resulted from tasting something brackish and foul. "_Ugh!_ I'm sorry, Cal." "I'm raving mad! That dupe!" "Cal--never say that word again. Not about your twin brother." "Look, my neuropsychiatristic female, I'm as stable as any twin could be. Dwelling on the subject of duplication is something I won't do. But the foul, rotten trick. What was he after, Tink?" "Nothing, apparently. Just up to deviltry." "Deviltry is fun. He was up to something foul. Imagine anyone trying to take another's identity. That's almost as bad as persona duplication." Tinker went pale, and agreed. "Theft of identity--I imagine that Benj was only trying to be the stinker he is supposed to be. That was a rotten trick"--Tinker wiped her lips, applied neoform on a cello-cotton pad and sterilized them thoroughly--"to play on a girl." She looked at the pad and tossed it into the converter chute. "A lot of good that will do. Like washing your hands after touching a criminal. Symbolic--" "Tinker, I feel cheated." "And I feel defiled. Come here, Cal." The result of his approach was enough to wipe almost anything from the minds of both. It went a long way towards righting things, but it was not enough to cover the depths of their mental nausea at the foul trick. That would take years--and perhaps blood--to wash away. * * * * * "Hello, Cal," she said, as they parted. "I'm glad you're back." "I know," she laughed. "Only Dr. Tinker Elliott could drag Specialist Calvin Blair into anything resembling a hospital, let alone a neurosurgical laboratory." "Wild horses couldn't," he admitted. "That's a left-handed compliment, but I'll treasure it--with my left hand," she promised. "Benj--and I can speak without foaming at the mouth now--couldn't have played that trick on you if you'd seen me during the last three months." "True. Three months' absence from you made his disguise perfect. I'd forgotten just enough. The rotter must have studied ... no, he's an identical twin, isn't he?" "Right," gritted Cal. "But look, Tinker. This is no place to propose. But why not have me around all the time?" "Nice idea," said Tinker dreamily. "You'll come along with us on the next expedition, of course?"