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.”

It was a remarkable prophecy, remarkably fulfilled. Elk was gratified and surprised when he was called into the presence of the great—every Commissioner and Chief Constable sat round the green board of judgment—to discover that the attitude of his superiors was rather one of benevolent interest than of disapproval.

“With an organization of this character we are prepared for very unexpected developments,” said the Chief Commissioner. “In ordinary circumstances, the escape of Hagn would be a matter calling for severe measures against those responsible. But I really cannot apportion the blame in this particular case. Balder seems to have behaved with perfect propriety; I quite approve of your having put him into the cell with Hagn; and I do not see what I can do with the gaoler. The truth is, that the Frogs are immensely powerful—more powerful than the agents of an enemy Government, because they are working with inside knowledge, and in addition, of course, they are our own people. You think it is possible, Captain Gordon, to round up the Frogs?—I know it will be a tremendous business. Is it worth while?”

Dick shook his head.

“No, sir,” he replied. “They are too numerous, and the really dangerous men are going to be difficult to identify. It has come to our knowledge that the chiefs of this organization—at least, some of them—are not so marked.”

Not all the members of the Board of Inquiry were as pleasant as the Chief Commissioner.

“It comes to this,” said a white-haired Chief Constable, “that in the space of a week we have had two prisoners killed under the eyes of the police, and one who has practically walked out of the cell in which he was guarded by a police officer, without being arrested or any clue being furnished as to the method the Frogs employed.” He shook his head. “That’s bad, Captain Gordon.”