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"I am afraid," said I, "that the facts are so obvious that you

will find little credit to be gained out of this case."

"There is nothing more deceptive than an obvious fact," he

answered, laughing. "Besides, we may chance to hit upon some

other obvious facts which may have been by no means obvious to

Mr. Lestrade. You know me too well to think that I am boasting

when I say that I shall either confirm or destroy his theory by

means which he is quite incapable of employing, or even of

understanding. To take the first example to hand, I very clearly

perceive that in your bedroom the window is upon the right-hand

side, and yet I question whether Mr. Lestrade would have noted

even so self-evident a thing as that."

"How on earth-"