They had made their way thus for about four hundred yards—that is to say, about a third of the length of the causeway—when suddenly the fog ahead of them became luminous, and they perceived torches waving.

"Mr. Rogers! Is that Mr. Rogers?" called a voice.

"Ay, ay, men!" Mr. Rogers hailed in answer, recognising his coastguard. "I am coming—fast as I can," he added, having at that moment run into a wall.

"A wreck, sir!"

"Ay! Where is it?"

"Somewhere beyond St. Ann's, sir, as we make it—out towards the Monk. There was a gun fired, and Dick, here, thinks as he saw the lighthouse send up a signal; but lights there's none that the rest of us can make out——"

"Hark!"

Again the fog shook with the concussion of a gun.

"Due west, as I make it out," said Mr. Rogers. "Are the boats ready?"

"Aye, sir; the jolly-boat manned and off, and the gig launched and lying by the slip."