With a curt nod to show that he meant what he said the German climbed down onto the street, and then motioned for Dave and Freddy to climb down, too.

"That building, there," he said and pointed. "March! And do not be so foolish as to try and run away. I warn you!"

Dave and Freddy simply shrugged and walked across the street to the doorway of a solidly built stone building. A guard standing in front clicked his heels and held his rifle at salute at the approach of the officer.

"My compliments to Herr Kommandant," the officer said sharply. "Leutnant Mueller reporting with two prisoners for questioning."

The guard saluted again, then executed a smart about face and went in through the door. Dave caught a flash glimpse of desks, and chairs, and the part of a wall covered by a huge map, before the door was closed in his face. He looked at Freddy and grinned, and then glanced up into the small eyes of the German officer. Those small eyes seemed to bore right back into his brain.

"You will do well to tell the whole truth!" the German said without hardly moving his lips. "Remember that!"

At that moment the door was reopened and the guard was nodding at the lieutenant.

"Herr Kommandant will see you at once, Herr Leutnant," he said.

"Good!" the officer grunted, and pushed Dave and Freddy in the back. "Inside, at once!"