She was looking out across the waves, which were fairly high to-day, and Patsy saw her lean forward and strike out to sea with strokes of remarkable swiftness. Bathers were scattered thickly along the coast, but only a few had ventured far out beyond the life-lines, so Patsy naturally sought an explanation by gazing at those farthest out. At first she was puzzled, for all the venturesome seemed to be swimming strongly and composedly; but presently a dark form showed on the crest of a wave--a struggling form that tossed up its arms despairingly and then disappeared.