Both Dawson and Farmer stiffened as though they had been shot in the back. For a long minute both held their breath clamped in their lungs as they stared at Colonel Welsh out of wide, disbelieving eyes. Then, finally, Dawson managed to regain control of his tongue.

"Maybe you'd better repeat that, sir," he said with an effort. "That envelope addressed to Secretary of State Cordell Hull was nothing but a lot of blank paper? And Freddy, and I—?"

"That's right," the other replied quietly. "Just blank paper. And you and Farmer darned near lost your lives over a sealed envelope of blank paper. But—well, it was something like the stunt you pulled on that Herr Miller, Dawson. The very fact that you were so eager to have him search you convinced him that you didn't have what he wanted. And that conviction baffled him so, that you were able to catch him off guard, and get away with your colossal bluff. In other words, by doing the one thing he didn't expect you to do, you made him believe that you had done the exact opposite."

The Chief of U.S. Intelligence took time out for a moment to light up a cigar.

"Well, we did something the same way, you might say," he continued presently. "But I'll have to give you a bit of history by way of explanation. At a recent meeting between Prime Minister Churchill and President Roosevelt, and their respective staffs, a detailed agreement was reached regarding the vitally important matter of military and economic aid to China. The entire program was mapped out in detail. And after the meeting a pledge was drawn up—a secret pledge to Generalissimo Chiang Kai-shek, and the Chinese peoples. It was perhaps one of the most secret documents drawn up in this war thus far. It contained everything. Amounts of guns, tanks, planes, ammunition, and so forth to be delivered by England and the United States to China. The supply routes to be followed. Dates of arrival. Troop strength, flying strength, and ground crew strength, and so forth. Plus locations of air bases selected by an Air Forces commission recently returned from China. In short, everything that China wants, needs, and wishes to know."

The senior officer paused again to take care of his cigar that had gone out.

"Well," he continued as blue cigar smoke drifted ceilingward, "all that was drawn up here in the States, and signed by the necessary parties. Then it was sent to England for English signatures. Right there we threw Axis rats, who had got wind of the document, off the track for a short time. It seems that they expected it all to be drawn up in England, and sent over here for signatures. So they kept watchful eyes on all our courier planes, diplomatic pouches, and such, ready to leap and strike the instant that document was on its way back to the States. Naturally, for the Axis boys to get their hands on that agreement would be worth a dozen victories in the field. Not only would they learn what we could, and could not, do for China, but they could use it as a powerful propaganda weapon against China. Particularly, the Japs could use it. Imagine how the brave Chinese would feel to find out first from their enemies what their allies were going to do for them! It would put the war in the Far East back a full year, at least. So it was absolutely essential to keep this agreement a perfect secret, get it to Chiang Kai-shek's hands by a fast route the Axis spies would least suspect, and then let Chiang Kai-shek decide what parts of it he would let be made public, and what parts would continue to remain a secret."

"Which, of course, ruled out the usual diplomatic channels," Dawson grunted as the senior officer paused for breath. "Or even a special courier. The Axis rats would probably smell out both angles."

"Exactly as we figured it," Colonel Welsh grunted, with a nod for emphasis. "But, to make doubly sure of everything, it was decided to cross up the Axis agents in England. In other words, to actually slip it into a diplomatic pouch bound for Washington by plane, but make it appear that we were trying to sneak it out of the country by secret courier. By the way, did you two enjoy meeting Mr. Soo Wong Kai?"

Dawson and Farmer sat bolt upright again.