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 And they reckon you to be some spy. Why, a Yankee crook would be into that with a canopener. If I’d known that any letter of mine was goin’ to lie loose in a thing like that I’d have been a mug to write to you at all.”

“It would puzzle any crook to force that safe,” Von Bork answered. “You won’t cut that metal with any tool.”

“But the lock?”

“No, it’s a double combination lock. You know what that is?”

“Search me,” said the American.

“Well, you need a word as well as a set of figures before you can get the lock to work.” He rose and showed a double-radiating disc round the keyhole. “This outer one is for the letters, the inner one for the figures.”

“Well, well, that’s fine.”

“So it’s not quite as simple as you thought. It was four years ago that I had it made, and what do you think I chose for the word and figures.”

“It’s beyond me.”

“Well, I chose August for the word, and 1914 for the figures, and here we are.”

The American’s face showed his surprise and admiration.

“My, but that was smart! You had it down to a fine thing.”

“Yes, a few of us even then could have