"Careful, there," ordered Dave. "Don't cling to that wing or bear it down."
"I can't hold out."
Dave cautiously edged from his seat towards a form now plainly visible. It was that of a man about thirty years of age.
It was no easy task to take the man aboard. One of his hands was useless. He seemed in pain and half choked with water he had swallowed.
Hiram gave up his seat to the rescued man, who sank back as if overcome with faintness and exhaustion. Hiram himself found a resting place on the platform supporting the two seats.
"Is there anybody else in trouble?" Dave asked of their passenger.
"No, no," replied the man. "The launch is gone up. Get me to land quick as you can. I'm afraid my arm is broken. It pains me terribly. I must get to a surgeon soon as possible."
Dave got the hydroplane under way again.
He was fortunate in striking a course that brought them back to the boat house in about an hour's time.
The rescued man was somewhat revived by this time, and when the hydroplane was safely housed, Dave took his arm and piloted the way from the beach.