"Good morning," she called.

"Beautiful day for a swim, isn't it ?" "Yes," growled the young man, brusquely.

He turned and began to swim in the opposite direction, up the cove.

The girl looked after him, raised a puzzled eyebrow, and then, with a shrug, waded into the water.

The next time the assistant looked at her, she was swimming with long, sweeping strokes down the narrow creek to the bend and the deep hole at the end of the wharf.