That would give them a chance of being picked up.

It is well known that sailors have clung for hours to a spar or a hen coop.

Kardofan had gone on deck again.

Presently he came below.

“Ship coming nearer, sahib,” he cried. “Hear the beat-beat of the engines closer than ebber before.”

“Can’t you do anything?” asked Harry.

“Me fire pistol shot, but it do no good at all.”

Hearing this, Harry ordered Clara, Mole and Monday to follow him to the deck.

They did so.

There was a white mist which made everything impenetrable at a few yards’ distance.