"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.
"Yes," she said, "I will. But what are you getting at?"
The Saint grinned.
"Then hold on," he said, "because your faith in my word is going to get a shock."
He slipped a hand into his breast pocket and brought it out with a heavy envelope.
"Take a look. No charge for inspection."
She turned the envelope over. It was not sealed. Turning back the flap, she drew out a thick bundle of papers and unfolded them.
At the sight of the first one, her face changed. Then she glanced rapidly through the rest. She turned to the Saint with a frown on her eyebrows and a half-smile on her lips.
"You—blighter!"
"I told you your faith would take a toss."
"But why not tell me right away?"
"Tell you what?"
The innocence of the Saint's wide blue eyes was blinding.
"Why not tell me at once that you'd bust the Records Office?" she said.
"Because," said the Saint blandly, "it wouldn't have been precisely true. I'm always very particular about telling the precise truth," he said virtuously.
"It's either true, or it isn't——"
"Talking of macaroons," said the Saint hurriedly, "have you noticed the last sheet?"
She looked.
"It's blank."
"A valuable curiosity. Once upon a time some person or persons whom we will call unknown unlawfully obtained private papers from the files of Scotland Yard. In place of said papers, the said person or persons left an equivalent number of blank sheets. The blank sheet you hold in your hand is a specimen of the same. Very interesting."
She stared.
"One of the sheets that were left in the file?"
"No. An identical sheet, out of the block from which the sheets left at the Yard were taken. Now here"—the Saint dived into another pocket—"is one of the sheets that were left at the Yard. If you compare the two—"
Jill Trelawney took the second sheet in her hand.
She said breathlessly: "But how the——"
Simon Templar smiled seraphically.