He knotted a strong leather cord to the stake, brought it forward and secured it to the frame of the machine.
"Now, Beatrice," he directed, "when I'm ready you cut the cord. I haven't any corps of assistants to hold me back till the right moment and then give me a shove, so the best I can do is this. Give a quick slash right here when I shout. And whatever happens don't be alarmed. I'll come back to you safe and sound, never fear. And this afternoon it's 'All Aboard for Boston!'"
Smiling and confident, he cranked the motor. It caught, and now a chattering tumult filled the air, rising, falling, as Stern manipulated throttle and spark to test them once again.
Into the driver's seat he climbed, strapped himself in and turned to smile at Beatrice.
Then with a practiced hand he threw the lever operating the friction-clutch on the propeller-shaft. And now the great blades began to twirl, faster, faster, till they twinkled and buzzed in the sunlight with a hum like that of a gigantic electric fan.
The machine, yielding to the urge, tugged forward, straining at its bonds like a whippet eager for a race. Beatrice, her face flushed with excitement, stood ready with the knife.
Louder, faster whirled the blades, making a shiny blur; a breeze sprang out behind them; it became a wind, blowing the girl's hair back from her beautiful face.
Stern settled himself more firmly into the seat and gripped the wheel.
The engine was roaring like a battery of Northrup looms. Stern felt the pull, the power, the life of the machine. And his heart leaped within him at his victory over the dead past, his triumph still to be!
"All right!" he cried. "Let go--let go!"
The knife fell. The parted rope jerked back, writhing, like a wounded serpent.
Gently at first, then with greater and greater speed, shaking and bouncing a little on the broad, flat wheels that Stern had fitted to the alighting gear, the plane rolled off along the firm-beaten sands.
Stern advanced the spark and now the screw sang a louder, higher threnody. With ever-accelerating velocity the machine tooled forward down the long stretch, while Beatrice stood gazing after it in rapt attention.
Then all at once, when it had sped some three hundred feet, Stern rotated the rising plane; and suddenly the machine lifted. In a long smooth curve, she slid away up the air as though it had been a solid hill--up, up, up--swifter and swifter now, till a suddenly accelerated rush cleared the altitude of the tallest pines in the forest edging the beach, and Stern knew his dream was true!