Phyllis turned scarlet with embarrassment, but Madge’s eyes sparkled with delight. She was no longer ashamed of having been chosen as valedictorian. In spite of herself, Phyllis Alden was the star of their commencement.

It was not until the four girls were seated with their dear ones about a round luncheon table in the largest hotel in Harborpoint that Madge suddenly recalled the stranger whose warning cry had probably saved her from a serious hurt.

Mrs. Curtis and Tom were entertaining in honor of Madge and Phyllis. There were no other guests except the two houseboat girls, Eleanor and Lillian, Dr. and Mrs. Alden, and Mr. and Mrs. Butler.

Madge sat next to Tom Curtis, and during the progress of the luncheon managed to say softly: “Did you see who it was that called my name so strangely this morning, Tom? I was so frightened at having to deliver my valedictory that when I heard that sudden shout, ‘Madge!’ I was too much confused to recognize the voice.”

Tom shook his head. “I don’t know who it was. I heard the voice but couldn’t discover its owner. It must have been some one at the very back of the room, for no one in the audience seems to know who called out to you.”

“I suppose I’ll never know,” sighed Madge. “It is a real commencement day mystery, isn’t it?”

Tom nodded smilingly. “By the way, Madge, where are the houseboat girls going to spend the summer after you come to Madeleine’s wedding?” he asked. “You must be tired after your winter’s work.”

Madge shook her head soberly. “We are not going to be on the houseboat this year,” she whispered. “Going to New York to be bridesmaids is about as much as four girls can arrange. We haven’t even dared to think of the houseboat.”

“I have,” interposed Phyllis, who had heard the remark and the reply, “but we don’t wish our families to know. You see, Madge and I are hoping and planning to go to college next winter, so, of course, we can’t afford another summer holiday,” she ended under her breath.

“What’s that, Phil?” inquired Dr. Alden from the other end of the table.