“Won’t turn—sticks. Oil.”

Roach handed a little oil tin from the portmanteau, the key was withdrawn and lubricated and once more thrust in, to evidently act upon a part of the mechanism of the great lock, but that was all.

“Bah!” ejaculated Arthur. “I know the beggar. It’s one of that sort you see at the safe shops. When you turn the key you shoot bolts, top, bottom and both sides. It nearly does. He made it quite to the wax pattern, and it only wants a touch or two. Here, give us the file.”

“Stop a minute.”

“What’s the matter?”

“I want to see if old Mrs Barron’s safe.”

“Look alive then. No, no; give me the file first.”

The tool was handed and the active young fellow held the key close to the light and began filing away where it seemed to him the wards of the key wanted opening; and he was still busy when Roach returned. “She’s all right,” he panted, his breath coming short as if he had been running.

“Oh yes, she won’t get clear of those knots—an old cat!—I know. You take it easy, old man; we’re as safe as safe.”

“But suppose the guv’nors come back from Paris, my dear boy?”