It would be rare sport to locate his secret burrow, all unsuspected.

But now I must really be off." "Good-bye, then," said Thorndyke, slipping a well-sharpened pencil through the rubber band that fixed the notebook to the board.

"Let me know how the adventure progresses--if it progresses at all--and remember, I hold your promise to come and see me again quite soon in any case." He handed me the board and the lamp, and, when I had slipped them into my pocket, we shook hands and I hurried away, a little uneasy at having left my charge so long..