"You mean, in case they do speak the truth?" the major murmured.

"Exactly that!" the colonel replied with a curt nod. "I doubt if there are any British forces within two hundred and fifty miles. Still, we must make sure. The success of this surprise smash against the British means much to me. It means everything. I wish to be removed from this cursed part of the world. I am sick of the sun, and the sand, and the flies and other insects. Soon, in case you have not been told, things will happen in the Balkans. That fat, stupid fool, Mussolini, has made a mess of things in Greece and Albania. It will soon be necessary for the Fuehrer to go to his aid, and pull him out of the fire. I hope to have a division command when the Leader marches down into Greece. If I smash the British out of Libya, and annihilate them so they cannot even escape to their Egyptian strongholds, I shall be given the command of a division of tanks for the asking. And I shall have it, never fear!"

The German colonel emphasized what he had just said by giving a savage nod of his head, and banging one huge clenched fist down on the table. Then he turned his glittering, half closed eyes upon the two boys.

"So you have been lost for four or even six days, eh?" he shot out. "Very well, then. Look closely at this map. Put your finger where you were when you started out of this advance patrol."

As the German spoke, he unfolded a military map and spread it out on the tables. Hope zoomed up in Dave. Perhaps the map would tell them about the plans of the expected attack against the British forces from Bengazi eastward to the Egyptian frontier. It might even show the location of the other Nazi units he was sure must be operating under the command of this headquarters colonel.

If he expected all that, however, or even a small part of it, he was doomed to disappointment. The instant he glanced at the map he saw that it was completely unmarked. He studied it for a moment as a stall for time. He didn't dare point out a spot too close to where he judged to be their present position. A short scouting trip by the Germans could prove them liars in no time at all. Yet at the same time he didn't want to indicate a point miles and miles away. It was obvious that the colonel suspected them, and to state they had wandered some two or three hundred miles across the desert would simply add to the German's suspicions. You don't walk that far in the desert in that short space of time. You don't even walk a small fraction of it—and live. Ten or fifteen miles in the cool of the night is about the limit.

Suddenly Freddy spoke up—Freddy, of the keen, sharp brain that had helped them avoid more than one enemy trap in the past.

"This map is printed in German, sir," he said. "I can guess at the spelling of some of the places, but I am not sure. The place where our patrol started from was called Amarir. Yes, I think that was the name. It was fifty miles southwest of El Siwa. One of the tanks broke down, and it was necessary to repair it at once. This officer and I went ahead on foot to reconnoiter the area beyond an escarpment. It was there the sand storm caught us."

Freddy paused, gave a little puzzled shake of his head, and scowled down at the map.

"I'm sure my brother officer is mistaken," he said presently. "It was not six days ago. No. Perhaps it was not even four. I have lost track of the days completely. But where are we now, sir? Are we very far from El Siwa? Or perhaps Amarir?"