Dr. Beddersley came--a dapper little man, with pent-house eyebrows, and keen, small eyes, whom I suspected at sight of being Colonel Clay himself in another of his clever polymorphic embodiments. He was clear and concise. His manner was scientific. He told us at once that though the Bertillon method was of little use till the expert had seen the criminal once, yet if we had consulted him earlier he might probably have saved us some serious disasters. "A man so ingenious as this," he said, "would no doubt have studied Bertillon's principles himself, and would take every possible means to prevent recognition by them. Therefore, you might almost disregard the nose, the chin, the moustache, the hair, all of which are capable of such easy alteration. But there remain some features which are more likely to persist--height, shape of head, neck, build, and fingers; the timbre of the voice, the colour of the iris. Even these, again, may be partially disguised or concealed; the way the hair is dressed, the amount of padding, a high collar round the throat, a dark line about the eyelashes, may do more to alter the appearance of a face than you could readily credit." "So we know," I answered. "The voice, again," Dr. Beddersley continued. "The voice itself may be most fallacious. The man is no doubt a clever mimic. He could, perhaps, compress or enlarge his larynx. And I judge from what you tell me that he took characters each time which compelled him largely to alter and modify his tone and accent." "Yes," I said. "As the Mexican Seer, he had of course a Spanish intonation. As the little curate, he was a cultivated North-countryman. As David Granton, he spoke gentlemanly Scotch. As Von Lebenstein, naturally, he was a South-German, trying to express himself in French. As Professor Schleiermacher, he was a North-German speaking broken English. As Elihu Quackenboss, he had a fine and pronounced Kentucky flavour. And as the poet, he drawled after the fashion of the clubs, with lingering remnants of a Devonshire ancestry." "Quite so," Dr. Beddersley answered. "That is just what I should expect. Now, the question is, do you know him to be one man, or is he really a gang? Is he a name for a syndicate? Have you any photographs of Colonel Clay himself in any of his disguises?" "Not one," Charles answered. "He produced some himself, when he was Medhurst the detective. But he pocketed them at once; and we never recovered them." "Could you get any?" the doctor asked. "Did you note the name and address of the photographer?" "Unfortunately, no," Charles replied. "But the police at Nice showed us two. Perhaps we might borrow them." "Until we get them," Dr. Beddersley said, "I don't know that we can do anything. But if you can once give me two distinct photographs of the real man, no matter how much disguised, I could tell you whether they were taken from one person; and, if so, I think I could point out certain details in common which might aid us to go upon."