"H'm!" said Mr. Downing suspiciously.

"Yes, I saw Smith go into the bathroom," said Mr. Outwood. "Smith, I cannot quite understand what it is Mr. Downing wishes me to do."

"My dear Outwood," snapped the sleuth, "I thought I had made it perfectly clear. Where is the difficulty?"

"I cannot understand why you should suspect Smith of keeping his shoes in a cupboard, and," added Mr. Outwood with spirit, catching sight of a good-gracious-has-the-man-no-sense look on the other's face, "Why he should not do so if he wishes it."

"Exactly, sir," said Psmith, approvingly. "You have touched the spot."

"If I must explain again, my dear Outwood, will you kindly give me your attention for a moment. Last night a boy broke out of your house, and painted my dog Sampson red."

"He painted...!" said Mr. Outwood, round-eyed. "Why?"

"I don't know why. At any rate, he did. During the escapade one of his shoes was splashed with the paint. It is that shoe which I believe Smith to be concealing in this cupboard. Now, do you understand?"

Mr. Outwood looked amazedly at Psmith, and Psmith shook his head sorrowfully at Mr. Outwood. Psmith's expression said, as plainly as if he had spoken the words, "We must humor him."

"So with your permission, as Smith declares that he has lost the key, I propose to break open the door of this cupboard. Have you any objection?"