Rosalind, having succeeded in discouraging the attempts of Fortescue Jones to explain just why the fox trot represented more foot-tons of energy per mile than the one-step, managed to escape alone for a stroll about the island.

She was not particularly interested either in her hosts or their guests. But she endured that patiently. What really annoyed her was the persistence with which her mind reverted to Sam, the boatman.

The uproar over the batteries had merely served to rekindle the matter. She was by no means at peace when she thought of the uncouth navigator and his slatternly boat. He not only puzzled, but vaguely disturbed her.

Of course, for his own safety, she felt well assured he would attempt to cause her no annoyance; and yet the foundation for possible embarrassments and unwelcome explanations was there. She was not a law-breaker, to be sure; but the boatman emphatically was. And in some measure it seemed that she had been an accomplice.

The rack and thumb-screw could not have extorted confession from Rosalind concerning some of the things that had happened. But the difficulty lay in the fact that the boatman, if he chose, could render her own confession superfluous. And what might he not do, if caught, to save his own neck?

She was particularly annoyed when she remembered the interview that had been of her own seeking. The result, so far as she was concerned, had been rather inglorious. He had even laughed at her! He had refused the bribe she offered; he would put no price on his silence.

And he had called her pal! Her cheeks went hot when she remembered that.

Down at the Witherbee wharf, Rosalind sat and idly watched a small power-boat that stood a mile off the island, evidently irresolute as to destination. It was not until it finally laid an unmistakable course for the Witherbee place that her interest was awakened.

When the boat reached the landing, one of the two men who occupied it lifted his cap and inquired if it was Mr. Witherbee's Island. Being assured that it was, the men fastened their craft, stepped out, and went up the path toward the house, the direction of which Rosalind had indicated with a gesture.

Half an hour or so later they returned, Mr. Witherbee with them. All three were talking volubly. One of the strangers held a paper in his hand.