What made this burglary all the more remarkable was that, for the first time, there had appeared somebody who claimed to be the Frog himself. Never before had the Frog given tangible proof of his existence. He understood the organization well enough to know that none of the Frog’s willing slaves would have dared to use his name. And why did he consider that Johnson was worthy of his personal attention? “No,” said Johnson in answer to his question, “there are no documents here of the slightest value. I used to bring home a great deal of work from Maitlands; in fact, I have often worked into the middle of the night. That is why my dismissal is such a scandalous piece of ingratitude.” “You have never had any private papers of Maitland’s here, which perhaps you might have forgotten to return?” asked Elk thoughtfully, and Johnson’s ready smile and twinkling eyes supplied an answer. “That’s rather a graceful way of putting the matter,” he said. “No, I have none of Maitland’s documents here. If you care, you can see the contents of all my cupboards, drawers and boxes, but I can assure you that I’m a very methodical man; I know practically every paper in my possession.” Walking home, Elk reviewed the matter of this surprising appearance. If the truth be told, he was very glad to have some additional problem to keep his mind off the very unpleasant interview which was promised for the morning. Captain Dick Gordon would assume all responsibility, and probably the Commissioners would exonerate Elk from any blame; but to the detective, the “people upstairs” were almost as formidable as the Frog himself. CHAPTER XXII THE INQUIRY HE intended making an early call at King’s Cross to examine the contents of the bag, but awoke the next morning, his mind filled with the coming inquiry to the exclusion of all other matters; and although he entered Johnson’s burglary in his report book very carefully, and locked away the cloak-room ticket in his safe, he was much too absorbed and worried to make immediate inquiries. Dick arrived for the inquiry, and his assistant gave him a brief sketch of the burglary in Fitzroy Square. “Let me see that ticket,” he asked. Elk, unlocking the safe, produced the green slip. “The ticket has been attached to something,” said Dick, carrying the slip to the window. “There is the mark of a paper-fastener, and the mark is recent. This may produce a little information,” he said as he handed it back. “It’s very unlikely,” said Elk despondently as he locked the door of the safe. “Those people upstairs are going to give us hell.” “Don’t worry,” said Dick. “I tell you, our friends above are so tickled to death at recovering the Treaty that they’re not going to worry much about Hagn.”