But before anything more could be said they were surprised to see Stammering Nat coming toward them on a run, for he had been watching the last of the bonfire to make sure it did no harm; and of course, as he was brimful of excitement, he had lost all power of control over his voice.

He tried the best he knew how, to regain the mastery of his vocal chords; even resorting to an old expedient of whistling, that perhaps had served him on some previous occasion. Finding everything of no avail, he clutched Andy by the sleeve, and started dragging him around the corner of the shed.

"Hey! what ails you, Nat?" shrilled the struggling Andy, wondering whether the other could have lost his mind because of his great affliction.

Another moment and the rest heard Andy give tongue in a way that announced his complete surrender to the same mysterious source of excitement that had mastered Nat. Of course this needed an explanation; and accordingly Frank and Elephant dashed off, with Colonel Josiah stumping along close behind; and even Larry, leaving his cooking dinner, to come after them, still clinging to Frank's gun.

CHAPTER XII

SANDY DROPS SOMETHING

"Whoop! now, what d'ye think of that?" shouted Elephant, as soon as he turned the corner of the shed.

"Percy shies his hat in the ring! Another man-bird come to keep the pot boiling! Now, will you be good, Frank? Look at it eat up distance, will you? Say, that's going some, I tell you!" Larry exclaimed.

"Percy deserves credit for staying up about all night to assemble the parts of his new biplane, and that's a fact!" Frank candidly admitted; as with kindling eyes he watched the progress of the new wonder that marked the latest achievement in the line of aviation, as advanced by a well-known brand of builders.

His whole heart and soul were wrapped up in the strange calling that seemed to be his birthright; so that he could even admire the clever work of a bitter rival, and applaud his successful evolutions.