“Sure,” replied the other, “and the little window partly open, to give us air, for it’s close in here. Now turn in and don’t let me hear a yawp from you till morning.”

“Oh, I’ll sleep as sound as a nut; always do. That is, if I don’t get to dreaming something about that darling little——” but as Frank threw a block of wood across the shed and made the speaker duck his head, he did not finish his sentence.

Presently all was quiet within the long shed, save the regular breathing of the two boys. The moonlight sifted in through the open window and lighted up the queer workshop after a fashion, so that the great batlike object occupying so much space could be dimly made out.

Perhaps an hour had gone by. From without there came only such sounds as one might expect to hear on a July night in the country, for the place of Colonel Whympers was outside of Bloomsbury and really surrounded by fields and woods.

Something suddenly aroused Frank. He hardly knew himself what it could have been, but as he sat upright in his blanket he believed he heard loud voices somewhere outside. Then something that seemed to be very heavy came down with a loud impact that awoke even that hard sleeper, Andy.

“What was that?” he exclaimed, sitting bolt upright.

Frank, quick to act, was already out of his warm nest and making a bee line for the window, which happened to be in a quarter that could be reached without his stumbling over the monoplane occupying the middle of the place.

Of course, not to be outdone, Andy tumbled off his cot, climbed to his feet and as the doors happened to be more convenient to him, he was quickly throwing the heavy bar aside. This done, the impulsive Andy rushed straight outside, clad only in his pajamas as he was.

CHAPTER V.
A MESSAGE FROM THE SKY.

When Andy thus wildly rushed out of doors he fell over some object which he did not chance to see. Perhaps in his excitement he even imagined some one had given him a clip alongside the head with a club, for he struck the ground with a bang that must have made him see stars.