With this warning the four men walked away and Hall got busy with a diligence inspired by a sense of danger and, at the same time, a sense of the opportunity afforded by the possibilities of the world's latest great invention, radio.

CHAPTER XIX

"S O S" from Friday Island

Max Handy, the Canadian youth at Rockport, who gave the crew of the Catwhisker, by wireless, directions whereby the latter were able to locate "mathematically" the whereabouts of the "Canadian Crusoe's Friday Island" listened in much of the time thereafter, in the hope of being able to keep in touch with developments to the end of this interesting radio affair.

And this hope was realized in a degree that could hardly have been expected with moderation. But he was well equipped, and, being mechanically inclined, and industrious, he was able to get a maximum of results with his sending and receiving outfit.

He had traced the rescue yacht all the way from Oswego to Friday Island, and the last message he had picked up from the three young radio Americans was the one that completed the agreement under which the yacht was to proceed to Rockport next day and meet the father of the "missing Crusoe". Then he attempted to get in communication with the island operator, but Mr. Perry had just announced that the next number on the program would be "everybody to bed at once", and there was no more listening-in before the next morning.

Max stayed up late that night, with phones to his ears, eager to get another message from the island, and he was a very much disappointed enthusiast when at last he gave up his efforts, convinced that they were useless. He slept late next morning and consequently lost an opportunity to respond to Hal's first call to enlist the aid of the Rockport amateurs in the campaign to rescue the missing "Crusoe".

But at last he caught a message from the island, and the conversation, translated from code, that took place between him and Hal, following a few introductory inconsequentials, was as follows:

"I listened-in last night and heard your arrangements for today," the
Canadian dot-and-dashed. "When are you coming to Rockport?"

"Two of us are on the way," Hal replied. "They ought to be there by this time."