With a heave Hythe lifted the padrone within reach of those within the conning-tower, the Cornishman followed, and by a display of remarkable yet undignified agility the sub succeeded in gaining safety ere a tremendous breaker hurled itself in vain against the massive metal plating.

The "Aphrodite" was quickly submerged to a depth of nine fathoms and driven ahead at a modest seven knots, while steps were taken to restore the rescued man and boy to life. It did not take long for the latter to open his eyes, but in the case of the old man three hours of unremitting toil failed to give any sign of success. More than once Hythe shook his head doubtfully, but Captain Restronguet had no intention of admitting defeat. As fast as one of the operators showed signs of fatigue another took his place in their efforts to restore the action of breathing.

After exactly three hours and ten minutes' steady work the old Italian showed signs of respiration.

"We've managed it," exclaimed Kenwyn joyfully, in the tone of a man who has fought a hard struggle and has won the victory.

"Avast there!" ordered the captain to Gwennap who was still pressing and relaxing the pressure on the patient's body. "Watch him carefully."

But in less than a minute the natural breathing ceased, and the efforts to restore respiration had to be renewed. It was not until half an hour later that the padrone was able to be put to bed and allowed to sleep, Kenwyn and Hythe volunteering to stand by and keep a watch over the patient.

It was now daylight. The fury of the waves had abated, and only a long sullen roll served as a reminder of the terrific agitation of the sea a few hours previously.

Captain Restronguet, therefore, decided to bring the "Aphrodite" to the surface, so that the loss of time during the period when the submarine was in the zone of the volcanic disturbance could be made good.

"The deck looks different to me, sir," remarked the quartermaster when Captain Restronguet entered the conning-tower. "I've noticed it ever since it grew light."

"How do you mean different?" asked the captain going towards one of the scuttles. A moment later he shouted to the chief officer.