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 next door. A giant negro, fantastically dressed in a red embroidered coat, yellow trousers and a military cap, discreetly distributed cards to those of the passing crowd who consented to take them.

This mode of dentistic advertising was a common sight to Rudolf. Usually he passed the dispenser of the dentist’s cards without reducing his store; but to-night the African slipped one into his hand so deftly that he retained it there smiling a little at the successful feat.

When he had travelled a few yards further he glanced at the card indifferently. Surprised, he turned it over and looked again with interest. One side of the card was blank; on the other was written in ink three words, “The Green Door.” And then Rudolf saw, three steps in front of him, a man throw down the card the negro had given him as he passed. Rudolf picked it up. It was printed with the dentist’s name and address and the usual schedule of “plate work” and “bridge work” and “crowns,” and specious promises of “painless” operations.

The adventurous piano salesman halted at the corner and considered. Then he crossed the street, walked down a block, recrossed and joined the upward current of people again. Without seeming to