"Not exactly," Freddy replied. "Just the old guessing game again. I am guessing, though, that somebody found out about those sealed envelopes. Also, they found out that you and I were acting as the messenger boys. Also, they arranged that balmy life-raft and U-boat business this afternoon. And also, Colonel Welsh is a very worried man, right at the moment."

"All of which means nothing," Dawson added, "and will continue to mean nothing until the colonel gets here, and explains. If he does."

"Most naturally!" Freddy said with a slight edge to his voice. "I've been doing some extra thinking about this thing, in case you don't realize it."

"Well, go right ahead and think yourself black, blue, and sky-pink in the face, if it makes you happy, little man," Dawson said with a laugh, "but you still won't know from beans until the colonel gets here. And if he—"

"I know, I know!" Freddy interrupted with an impatient gesture of his hand. "Save your breath, old thing. However, you might give this a bit of thought, if your brain can stand the strain. We've been flying part of the air transport route to North Africa."

"No kidding?" Dawson said with a mock gasp. "Why, I always thought the air transport route to North Africa was by way of Salt Lake City and Alaska!"

"Very, very funny!" Freddy snapped. "If I'm not boring you, Major Parker said he was sent down here to keep an eye out for sabotage. He also said nothing has happened in all the time he's been here. Colonel Welsh admitted that his special agents were acting as C.O. of the points where we've stopped and were going to stop. Why, Dave? Why should Intelligence have a sudden interest in this air route to North Africa?"

Dawson started to make another wisecrack, but the deadly serious look on young Farmer's face stopped him. He gave the question a moment or two of thought and then shook his head.

"I don't know, Freddy," he replied. "I really don't know. You can search me. If it isn't because of possible sabotage, then what?"

"I guess I've asked myself that question a thousand times," the English-born air ace said slowly. "I can think up but one answer that might make sense. This is it. All these arrangements are being made to make absolutely sure nothing will happen to something very special that is soon to be flown to North Africa."