"I thought that sort of thing was never done except in comic newspapers," she said, but Jean did not smile. Her eyes were focused on the point where the unseen observer lay or sat, and she shaded her eyes.

"Some visitor from Monte Carlo, I expect. People at Cap Martin are much too respectable to do anything so vulgar."

Mr. Briggerland, at a glance from his daughter, slipped into the water, and with strong heavy strokes, made his way to the shore.

"Father is going to investigate," said Jean, "and the water really is the warmest place," and with that she fell sideways into the blue sea like a seal, dived down into its depths, and presently Lydia saw her walking along the white floor of the ocean, her little hands keeping up an almost imperceptible motion. Presently she shot up again, shook her head and looked round, only to dive again.

In the meantime, though Lydia, who was fascinated by the manœuvre of the girl, did not notice the fact, Mr. Briggerland had reached the shore, pulled on a pair of rubber shoes, and with his mackintosh buttoned over his bathing dress, had begun to climb through the underbrush towards the spot where the glasses had glistened. When Lydia looked up he had disappeared.

"Where is your father?" she asked the girl.

"He went into the bushes." Mr. Stepney volunteered the information. "I suppose he's looking for the Paul Pry."

Mr. Stepney had been unusually glum and silent, for he was piqued by the tactless appearance of the Briggerlands.

"Come into the water, Marcus," said Jean peremptorily, as she put her foot against the edge of the raft, and pushed herself backward, "I want to see Mrs. Meredith dive."

"Me?" said Lydia in surprise. "Good heavens, no! After watching you I don't intend making an exhibition of myself."