"He's disappeared, sir?" Freddy Farmer choked out. "What blasted rotten luck! But isn't there something that can be done? I mean, have you any idea where Nikolsk might be? And—?"

"One thing at a time, Farmer," Colonel Welsh said with a chuckle, and held up his hand. "Not so fast, son. The thing's a mess right at the moment, but we have hopes."

"Sorry, sir," Farmer said, as the red rushed up his face to the roots of his hair. "But it was a bit of a let-down after getting all warmed up, you know."

"Well, that's the way with war," the American Intelligence chief said with a smile. "But to get on with my story. Just now I jumped ahead. So I'll go back to my agent in Tobolsk. Well, he stayed there in Nikolsk's cellar for four days. By the end of four days he had all his strength back, and falling down the empty well shaft was just an unpleasant memory. During those four days and nights Nikolsk was constantly with him, for the reason that a lot of Germans moved into the village. And from what Nikolsk could see they were there for some mysterious reason. I mean, they didn't camp, and they didn't have much equipment with them. Fact is, they were mostly Gestapo men in uniform.

"So for four days and four nights my agent and Nikolsk hugged that cellar and prayed to their gods that the Germans wouldn't stumble over them. And whenever he had the chance, my agent went to work questioning his new found Russian-friend, but, sorry to say, he didn't even get to first base. The instant those Germans showed up Nikolsk closed up like a clam. Matter of fact, my agent says that he was practically blue with fear most of the time. He seemed to think that the Gestapo boys were after him."

"Were they?" Dawson asked quietly as the other paused.

Colonel Welsh shrugged and dragged down the corners of his mouth.

"Yes and no," he said. "We don't know anything for certain. The next day Nikolsk left the cellar and didn't return. My agent waited a day longer, and then decided that it was time for him to be moving. He had some tattered peasant clothing that Nikolsk had given him, and he slipped out at night and continued his journey northward. In two days he was on the Russian side of the war. And as luck would have it, he bumped into a tank officer he knew. The rest was easy. A plane took my agent to Moscow. And after a day in Moscow he came on down here to London and reported to me. That was last night. When I heard his story I got in touch with the Air Vice-Marshal here. We went into a huddle, and—well, that brings us up to the present moment."

A hundred thousand questions had been leaping around in Dave Dawson's brain. So when the Colonel stopped talking he got the first one out as soon as he could.

"What about your Gestapo hunch, sir?" he asked. "Just how do you mean they've entered the picture? Only because of the Tobolsk business?"