“We don’t really know how to thank you folks,” continued the stout man; “we haven’t much longer to stay above water, as you see. We hit a derelict at dusk, and stove in our port bow. The water came rushing in so fast that I had barely time to flash that wireless that you so providentially caught.”

“It was feeble enough, I can tell you,” Frank assured him; “fortunately, we were not far off, and so managed to catch your appeal for help.”

The stout man was again warmly thanking his rescuers, when Dr. Perkins interrupted.

“Suppose you come on board,” he said; “by the looks of your craft she is likely to take a plunge at any minute. I’d like to be able to cut loose from her before that happens.”

Taking this hint, the stout man clambered on board the Sea Eagle with more agility than might have been expected from a man of his heavy build. This done he extended a hand to his friend, and then came the turn of the third occupant of the cabin roof to disembark. This third man was evidently, from his costume, a paid hand on board the Sea Eagle. He was slight and dark and foreign looking, with beady black eyes, and a not over-prominent chin.

Directly all were on board, Dr. Perkins ordered Frank to “cast off” from the sinking yacht. It was well this order was obeyed promptly, for hardly had the Sea Eagle been disengaged from the other craft’s side, than the Wanderer gave a sudden plunge, bow downward, under the waves. For one instant her stern upreared itself vertically, showing the rudder and propeller, and then, as if by magic, the whole craft vanished, to find a grave in the ocean bed.

All this was seen by the searchlight, which Dr. Perkins had kept concentrated on the yacht while the last act of this ocean drama was being consummated. As the yacht vanished a deep sigh broke from the stout man.

“Good-by, poor old Wanderer,” he said, “there’s an end of this cruise.”

“I am sorry that she was not in a condition to tow to Brig Island,” remarked Dr. Perkins.

“My dear sir, so far as the actual monetary loss is concerned it was fully covered by insurance,” responded the stout man; “my only regret is to see a craft I was very fond of end her days in such a fashion. Also, I am afraid my friend Griggs here will be disappointed at the failure of our cruise.”