"There's nothing," said the engineer after studying the waves for a moment.
"Oh, yes there was!" the girl insisted emphatically. "Something showed up on the crest of a wave. It's in the trough of the wave now. It'll come up again."
"Bit of wreckage from our yacht," suggested Joe.
"Not much wreckage on 'er," said the skipper. "All washed off 'er long before she sank."
"What could it be then?" The girl was fairly holding her breath. "It couldn't be—"
"Don't get your hopes up too high," cautioned Curlie. "Of course miracles do happen, but not so very often."