"That American boy is going to have a busy life bumping off aspiring corespondents some day," he murmured idly.

"What were you doing — on drain pipes?"

"Birds-nestin'."

"Simon!"

"All right, teacher. If you want to know, I'm going into the plumbing trade, and I wanted to do my studies on the cheap."

She stood up impatiently; and Simon laughed, and pulled her down again by a hand which he had not released.

Absent-mindedly, he kissed the hand.

"Thank you."

"Not at all," said the Saint politely. "Look here, will you believe me if I swear that Scotland Yard was robbed the night before last, and I didn't do my drain-piping till last night — or rather the small hours of this morning?"

She looked him puzzledly in the eyes.