Frank had instantly cut off much of their power, though they still continued to sweep onward toward the place of the catastrophe, and were rapidly drawing near the falling aeroplane.
Both boys stared at the terrible picture of the descending biplane nearing the heaving surface of the lake. It seemed very serious indeed, for any one to drop in this way; and yet how much more dangerous to fall upon land, where the wrecked aviators would stand a good chance of broken limbs, even though they saved their necks.
Then a cry from the impulsive Andy told that the biplane was in the water. If the engine had broken loose there was a pretty fair chance that the craft with its long extended planes would float, and even bear up the two aviators. Perhaps the quick-witted Casper Blue had looked out for just such a contingency, and found a way to free the framework from the dead weight of the motor.
Frank had all he could do to manipulate his own craft, for in order to alight successfully, even as a wild duck does, he must make a turn, and head up into the wind.
That meant the passage of a certain length of time; and meanwhile who could say what might not be happening to the imperiled men?
On the other hand, Andy could not tear his horrified gaze away from the wreck of the fallen biplane; and it was really upon him that the navigator must depend for his information as to how things were going.
Fortunately Andy could talk as well as look; no matter if his tongue did show a decided inclination to cleave to the roof of his mouth with horror, he managed to find a way to make it wag.
"It floats, Frank, sure it floats!" he ejaculated, presently, even as the other was in the act of making a sweeping curve, and skilfully ducking a squally puff of wind, turn back over the course they had just covered, to sink down upon the heaving waters when he found the chance. "Yes, they must have kicked the engine overboard. That makes three poor old Perc has lost, don't it? There they are, both of 'em, squattin' in the middle of the wreck, just as cool as you please, awaitin' for us to call in and take 'em off. Hope it don't sink before we c'n get back. If either one can't swim they'd go down like a stone. Now you're around, Frank; and we're heading straight for the place. Hurrah! Hold hard there and we'll lend you a helpin' hand!"
He even waved toward the two men by now pretty well submerged in the water, but who seemed to be still clinging to the floating aeroplane, as though recognizing that their position might be much more desperate should they cut loose from that buoy.
Frank was watching closely, to pick out a favorable opportunity to alight. Well did he know the chances he and his chum were taking in thus dropping upon the heaving surface of such a tremendous body of water as Lake Ontario. It was true that they had successfully performed this operation many times with their other hydroplane, but that was upon the much calmer waters of little Sunrise Lake, where the sea never arose heavy enough to imperil the floating aircraft. It would be much more perilous now, under these conditions; but Frank had made up his mind to attempt the rescue of those in the water, and was not to be easily daunted.