It found Carpenter pacing up and down, and frowning at a paper spread
open on his desk. At the messenger's apologetically discreet cough, he
glanced around and took the extended card.
"Show him in!" he snapped, and swept the paper from the desk and into a
drawer.... "Good-morning, sir!" as Marston bowed on the threshold; then,
without any preliminaries: "What success?"
"I have the French code-book," Marston replied.
"With you?"
Marston drew out the slender book. "It embraces all their codes, I
believe," he remarked.
"H-u-m!" said Carpenter thoughtfully, retrieving the paper he had just
swept into the drawer. "How are we to work it, Mr. Marston?"
"As allies," Marston replied. "I'm perfectly willing to let you have the
book and everything in it, if you will let me have a copy of the letter.
I'm confident that the key-word is here; I'm equally confident that the
letter does not involve, either directly or indirectly, the United
States. I understand that the letter is in the cipher of the Blocked-Out
Square; in this book there are two pages and more of key-words to this
Square, the last dozen or so of which are added in writing. If the
letter is in that cipher, we should have no particular difficulty in
finding the key-word.
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