"I suppose so," Charles murmured resignedly. "Everybody I meet seems to be Colonel Clay nowadays—except when I believe they are, in which case they turn out to be harmless nobodies. But who would have thought it was he after I pulled his hair out? Or after he persisted in his trick, even when I suspected him—which, he told us at Seldon, was against his first principles?"
A light dawned upon me again. But, warned by previous ebullitions, I expressed myself this time with becoming timidity. "Charles," I suggested, "may we not here again have been the slaves of a preconception? We thought Forbes-Gaskell was Colonel Clay—for no better reason than because he wore a wig. We thought Elihu Quackenboss wasn't Colonel Clay—for no better reason than because he didn't wear one. But how do we know he
