Psmith took the boot, and doing so, understood what before had puzzled him.

Across the toe of the boot was a broad splash of red paint.

He knew nothing, of course, of the upset tin in the bicycle shed; but when a housemaster’s dog has been painted red in the night, and when, on the following day, the housemaster goes about in search of a paint-splashed boot, one puts two and two together. Psmith looked at the name inside the boot. It was “Brown, boot-maker, Bridgnorth.” Bridgnorth was only a few miles from his own home and Mike’s. Undoubtedly it was Mike’s boot.

“Can you tell me whose boot that is?” asked Mr. Downing.

Psmith looked at it again.

“No, sir. I can’t say the little chap’s familiar to me.”

“Come with me, then.”

Mr. Downing left the room. After a moment Psmith followed him.

The headmaster was in his garden. Thither Mr. Downing made his way, the boot-bearing Psmith in close attendance.

The Head listened to the amateur detective’s statement with interest.