to have the missile fly to Paris. Of course at that height there was very little air resistance, which probably accounted for the ability of the missile to go so far. That, and the sub-calibre shell, made the seemingly impossible come within the range of possibility.
"What are you going to do, Tom?" asked Jack one evening, after an unsuccessful day's flight. For Tom was going toward his hangar.
"Going up."
"What for?" Jack went on.
"Oh, no reason in particular. I just feel like flying. We didn't do much to-day. Had to come back on account of mist, and we didn't see enough to pay for the petrol used. Want to come along?"
"Oh, I might, yes."
Tom and Jack went up, as did several more. But the two remained up longer than did the others, and Jack was somewhat surprised to see his chum suddenly head for the German lines, but at an angle that would take him over them well to the south of where the observation work had been carried on.
"I wonder what he's up to," mused Jack. "Guess I'd better follow and see."
There was not much chance of an aerial battle at that hour, for dusk was coming on. There had been no bombing squadron sent out, which
