"Look, something's wrong on that aircraft!"
"I should say so!" yelled Paul. "They've lost control of her!"
The big biplane was in serious difficulties, for it gave a lurch, turned turtle, and then, suddenly righting, shot downward for the river.
"They're going to get a ducking, all right!" cried Innis.
"Yes, and they may be killed, or drowned," added Paul.
"I'll do what I can to save 'em!" murmured Dick, as he turned on more power, and headed his boat for the place where the aircraft was likely to plunge into the water.
Hardly had he done so when, with a great splash, and a sound as of an explosion, while a cloud of steam arose as the water sprayed on the hot motor, the aircraft shot beneath the waves raised by the rapidly-whirling propellers.
"Stand ready now!"
"Get out a preserver!"
"Toss 'em that life ring!"