"Bless my pocket handkerchief, indeed I'll not," came the answer. "But I think I shall wrap up my throat in the scarf I brought along. I am subject to neuralgia, and the breeze may bring on an attack of it."

Wrapping a long, woolen scarf about his neck, the eccentric man ventured out on the open platform. About the middle of it, but sufficiently high to be above a person's head, was the forward propeller, whirring around at swift speed.

Tom, with his eye on the various gauges and the compass, was steering the airship. He glanced at Mr. Damon, who appeared to be enjoying the view from the platform. For an instant the eyes of the lad were taken from the form of his friend. He looked back suddenly, however, his attention attracted by a smothered cry. He was horrified by what he saw.

Mr. Damon was leaning far over the edge of the railing, with nothing between him and the earth a thousand feet below. He seemed to have lost his balance and had toppled forward, being doubled up on the iron pipe railing, his hands hanging limply over. Then, as Tom cried to Mr. Sharp to shut off the motor, the lad saw that, hanging to the blade of the propeller, and being whirled around in its revolutions, was a part of Mr. Damon's red scarf.

"Hurry! Hurry, Mr. Sharp!" yelled Tom, not daring to let go the steering wheel, for fear the ship would encounter a treacherous current and tilt. "Hurry to Mr. Damon!"

"What's the matter?" asked the balloonist.

"He's dead—or unconscious—hanging over the railing. He seems to be slipping! Hurry, or it will be too late!"

Chapter 14

Andy Gives The Clue