We were silent for a few moments. The girl looked idly round the ship, and her eyes encountered the figure of the mysterious man. She seemed to shiver.

“Oh!” she exclaimed under her breath, “what a terrible face that man has!”

“Where?” said her friend.

“Over there. And how is it he’s wearing a silk hat — here?”

His glance followed hers, but my follower had turned abruptly round, and in a moment was moving quickly to the after-part of the ship. He passed behind the smoke-stack, and was lost to our view.

“The back of him looks pretty stiff,” the young man said. “I wonder if he’s the chap that alarmed the man at the wheel.”