"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?" "You'll not go," said Cal. "Now we're at the same old impasse. We've come up against it for three years, Cal." "But why?" "Tony and I promised ourselves that we'd solve this mystery before we quit." Cal snorted. "You've been following in the footsteps of medical men who haven't solved Makin's Disease in the last hundred years. You might never solve it." "Then you'll have to play my way, Cal." "You know my opinion on that." "You persist in putting me over a barrel, Cal. I think a lot of you. Enough—and forgive me for thinking it—to ignore the fact that you are a twin. But I'll not marry you unless we can be together—somehow. I love surgery and medical research. I like adventuring into strange places and seeking the answer to strange things. Tony is my ideal and he loves this life too, as did our father. It's in our blood, Tony's and mine, and saying so isn't going to remove it." Cal nodded glumly.