The water, moved by a light wind, bubbled faintly against the sides of the canoe.

Neither spoke, but sat in silence, waiting hopefully for a pull on the lines.
Presently Paul heard a faint, wailing sound, coming from the mainland, but at first he paid little attention to it.

Then he noticed that Jim Hart had raised his head and was listening intently.

Naturally Paul then listened, too, with the same eager attention, and the faint wailing sound, singularly weird and strange in the night, came a second, and presently a third time.

But after that it was not repeated.