As usual, when she was troubled, the impulse came to her to be alone on the water. She had explained to Miss Jenny Ann that she might be gone for several hours, so there was no immediate reason why she should return to the houseboat. The other girls were yachting with some Cape May friends. Madge rowed her boat up the bay toward the home of the old sailor. She was not far from the very place where Captain Jules had rescued Tania and her a short while before. She thought of the strange-looking beam sticking up out of the sandy bottom of the bay on which Tania's dress had caught. It had certainly looked like the broken mast of an old ship. She determined to ask Captain Jules if any wrecks had recently occurred near that part of the bay, and concluded that she would row up to the sailor's house for the express purpose of asking him this question. Of course, this was only an excuse. She was deeply anxious to call on the old sailor again and, if possible, persuade him to keep his promise to her to show her his diving suit, and to tell her more of his strange experiences at the bottom of the sea. Captain Jules was sitting in his favorite place on the big rock just by the water in front of his house. He was mending the sail of his fishing boat. Madge's boat came round a slight curve in the bay, dancing toward him. This time Captain Jules spied his guest and saluted her as he would have greeted a superior officer. The little captain blushed prettily as she returned his salute in her best naval fashion. The old captain looked hurriedly toward his small house. There was no sight or sound of any one about. He seemed uncomfortable for a moment, then his face cleared. His deep blue eyes gleamed and his mouth set squarely. "Coming ashore to make me a call, Miss Madge?" he asked invitingly. Madge nodded. "If I shan't be in your way. You must let me just sit there on the rock by you. I have been reading a perfectly thrilling book about pearl-divers," she announced as soon as she was comfortably settled, "but none of the stories were as thrilling as the ones you told us. The book said that pearls had been found in New Jersey. I wonder if you have ever thought of diving down to the bottom of this bay to see if it holds any treasures?" The sailor was studying the girl's face so earnestly that he forgot to answer her. "Oh, yes, I have thought of it," he replied a little later, smiling at his guest. "A man never wholly forgets his trade. But what a taste you have for sea yarns, little lady! I half-way think, now, that if you had not been born a girl you might have followed the sea for your calling." "I should have loved it best of anything in the world," answered Madge fervently, gazing at the beautiful expanse of sunny, blue water. "I never feel as much at home anywhere as I do on the sea. You see," she continued confidingly, "I have a reason for loving the water. My father was a sailor. He was a captain in the United States Navy once."