"He's done it!" announced Kirkwood.

"If he has managed it there is no reason why we shouldn't," thought Barcroft grimly. "Stand by, old man; we'll shove down and pick him up."

The canal appeared to expand in size in order to meet the descending seaplane. It required all the skill and nerve at the youthful pilot's command to carry out his desperate plan. An error of a few feet to right or left meant irreparable damage to the frail craft and failure of his devoted efforts on behalf of his stranded friend.

With admirable judgment Billy brought his "bus" down, making a fine "landing" on the surface of the canal at a distance of less than a hundred yards from the crippled aircraft, Then, drifting gently, the seaplane brought up alongside the bank, with one of her floats rubbing against the edge of the tow-path.

"Nip out and hold her on, old man!" exclaimed Billy.

The A.P. obeyed promptly. Fortunately this required little or no effort, for the thick-set though leafless trees broke the force of what wind there was.

Barcroft quickly followed Kirkwood to the bank. Already Fuller had got ashore, and was preparing to destroy his machine when, to his utter astonishment, he had seen another seaplane skim over his head and alight at a short distance off.

Running by the path Billy approached the lieutenant.

"Come along, old man!" he said hurriedly. "There's no time to be lost. We'll give you a lift in our bus back to the old 'Hippo.'"

"Thanks," replied Fuller coolly. "What's the hurry? No Huns in sight. I'll do this job properly."