She gave him an enigmatic smile as they took up their tennis rackets.

Beyond an amused wonder at the vagaries of the modern American—or, at any rate, Maryland—girl, this incident made little impression on Fessenden’s mind, occupied as it was with schemes of its own. By the time luncheon had been over an hour or two, however, and it drew on to the time when he might be expected to take out the Will-o’-the-Wisp, he confidently anticipated a renewal of Miss Yarnell’s request.

He was downright disappointed, therefore, when the young woman in question announced that she had a slight headache and thought a nap would do her good. Polly and Mrs. Dick chorused hearty approval, and Pinckney advised a julep.

Thus supported, Miss Yarnell mounted the staircase from the wide hallway, not vouchsafing a single glance at Fessenden, who lingered rather ostentatiously about in his yachting flannels. Although his determination—as whimsical as the girl who had inspired it—to keep his projected visit to White Cottage a secret forbade the presence of Madge Yarnell upon the Wisp, he would willingly have had another trial of wits with her. However, this was denied him.

Mrs. Dick and Polly made perfunctory petitions to accompany him, easily waved aside. Dick Randall himself and Cresap were too lazy even to offer their companionship. May Belle and her follower had taken themselves off an hour before. Thus Fessenden found nothing to hinder his announced plan of trying out the Wisp alone.

“I’m off,” he declared. “By the way, if I’m not back for dinner, don’t worry, and don’t wait dinner for me. The wind may fall and make it a drifting match against time, you know, so don’t think of delaying dinner, if I don’t turn up.”

Once on board the sloop, he cast off, hoisted mainsail and jib, and stood away to the northward.

Although unfamiliar with the dry land of Maryland, Fessenden was not entirely so with its waters. Once or twice he had taken a cruise on the fickle Chesapeake, and he was fairly well acquainted with the character of the sailing and the configuration of the bay.

Moreover, he had given a half-hour’s close study to some of Cresap’s charts that morning. He knew, therefore, that his first long reach on the starboard tack would take him well clear of the land. Thence he planned to come about and sail with the wind to a little cove he had noticed on the map. This cove lay a mile or so above Sandywood, and was concealed therefrom by a heavily-wooded point. He counted upon making a landing there about six o’clock.

It was a delightful day for sailing. The breeze was firm, but not too strong—just brisk enough to ruffle the water with a steady purr under the bow as the sloop slid up into the wind.