“He is as far to the west as Uncle Tommy’s house, but a half mile north of that. This will show him all he needs to see in that direction.”
The watcher’s heart began to misgive him, for the machine was fast receding, and though Harvey must be intently watching he failed to make any sign. Even with the power of the field glass, the great bird with its spreading wings began to flicker, and Pendar was no longer able to clearly make out the forms of the youths seated therein.
Suddenly the aeroplane flickered, became indistinct and the nearer margin of the woods shut it from sight.
“Another failure!” muttered the watcher bitterly. “I may as well get ready to hand over that fortune to as vile a gang as was ever disgorged from the mountains of Sicily.”
The upper sash was lowered that he might obtain an unobstructed view of the soft tinted sky beyond. He took care to stand far enough back in the room to be out of sight of any persons in the street below. If either of the Italians had returned, he did not mean they should learn how he was spending the minutes.
“I did not provide last night what young Hamilton should do if he failed to make the discovery on his first, or rather second voyage over the woods. It will be risky for him to come back, but it may look as if he were on a little trial trip with his negro and wished to return so as to take charge himself. If he does that he will take a course to the south of his first trip, and, by Jove! there he comes!”
It gave the detective an expectant thrill to see the ship of the sky swim into his field of vision and head directly toward him. Harvey Hamilton was following the plan which had presented itself to the man. The first flight disclosed the home of Uncle Tommy Waters the weather prophet; the second revealed nothing, and the third, well to the south, must tell the tale. The crisis was at hand.
The officer did not call his field glass into play. The aeroplane was not only plainly visible, but was becoming more vivid every minute. Its elevation was five or six hundred feet, and the watcher breathlessly waited for the sudden shift that was to proclaim the discovery. The machine skimmed through the air without deviation, like a stone when it first leaves the sling, and then the abrupt shift came.
But to Pendar’s consternation the aeroplane instead of shooting upward dived toward the ground!
He snatched the glasses to his eyes. By their aid he saw Harvey Hamilton leaning forward and gesticulating excitedly to Bohunkus Johnson. The deafening racket of the engine rendered his voice useless, but he managed to make his wishes known. In desperate need he might reach the levers, and if anything had gone wrong with the machine this would have been done. But it was quickly evident that there had been a misunderstanding between the two. Bohunkus must have thought Harvey meant him to approach the earth, though it was impossible to land unless some open space presented itself. The dipping of the forward rudder brought the biplane half way down before the controller comprehended what was expected of him. Then he pointed the horizontal plane upward at so great an angle that the ascent became startlingly rapid.