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 is not all empty superstition. I had something to do with dogs when I was out West, and I know one when I hear one. If you can muzzle that one and put him on a chain I'll be ready to swear you are the greatest detective of all time."

"I think I will muzzle him and chain him all right if you will give me your help."

"Whatever you tell me to do I will do."

"Very good; and I will ask you also to do it blindly, without always asking the reason."

"Just as you like."

"If you will do this I think the chances are that our little problem will soon be solved. I have no doubt"

He stopped suddenly and stared fixedly up over my head into the air. The lamp beat upon his face, and so intent was it and so still that it might have been that of a clear-cut classical statue, a personification of alertness and expectation.