There was a man in the water, a man whose upper section, the only one
visible, was clad in a blue jersey. He wore a Derby hat, and from time
to time as he battled with the waves, he would put up a hand and adjust
this more firmly on his head. A dressy swimmer.

Scarcely had he taken in this spectacle when Marlowe became aware of
the girl he had met on the dock. She was standing a few feet away
leaning out over the rail with wide eyes and parted lips. Like
everybody else she was staring into the water.

As Sam looked at her the thought crossed his mind that here was a
wonderful chance of making the most tremendous impression on this girl.
What would she not think of a man who, reckless of his own safety,
dived in and went boldly to the rescue? And there were men, no doubt,
who would be chumps enough to do it, he thought, as he prepared to
shift back to a position of greater safety.

At this moment, the fat man in the tweed cap, incensed at having been
jostled out of the front row, made his charge. He had but been
crouching, the better to spring. Now he sprang. His full weight took
Sam squarely in the spine. There was an instant in which that young man
hung, as it were, between sea and sky; then he shot down over the rail
to join the man in the blue jersey, who had just discovered that his
hat was not on straight and had paused to adjust it once more with a
few skilful touches of the finger.

* * * * *

In the brief interval of time which Marlowe had spent in the state-room,