There were signs that the yacht's departure was imminent when they went down to the south quay and came abreast of her. The lights on the shore were being extinguished; the estate labourers were gone; only two or three sailors were busy with ropes and gear. And Vickers hurried his little party up a gangway and on to the deck. A hard-faced, keen-eyed, man, evidently in authority, came forward.

"Are you the captain of this vessel?" demanded Vickers in tones of authority. "You are? I am Mr. Vickers, solicitor, of Norcaster. I give you formal warning that the man you have known as Marston Greyle is not Marston Greyle at all, but an impostor. All the property which you have removed from the house, and now have on this vessel, belongs to this lady, Miss Audrey Greyle, Lady of the Manor of Scarhaven. It is at your peril that you move it, or that you cause this vessel to leave this harbour. I claim the vessel and all that is on it on behalf of Miss Greyle."

The man addressed listened in silent attention, and showed no sign of any surprise. As soon as Vickers had finished he turned, hurried down a stairway, remained below for a few minutes, and came up again.

"Will you kindly step this way, Miss Greyle and gentlemen?" he said politely. "You must remember that I am only a servant. If you will come down—"

He led them down the stairs, along a thickly-carpeted passage, and opened the door of a lighted saloon. All unthinking, the three stepped in—to hear the door closed and locked behind them.

CHAPTER XX

THE COURTEOUS CAPTAIN

Vickers sprang back at that door as the sharp click of the turning key caught his ear, and Copplestone, preceding him and following Audrey, who had advanced fearlessly into the cabin, pulled himself up with a sudden, sickening sense of treachery. The two young men looked at each other, and a dead silence fell on them and the girl. Then Vickers laid his hand on the door and shook it.

"Locked in!" he muttered with a queer glance at his companions. "What does that mean?"

"Nothing good!" growled Copplestone who was secretly cursing his own folly in allowing Audrey to leave the quay. "We're trapped!—that's what it means. Why we're trapped isn't a question that matters very much under the circumstances—the serious thing is that we certainly are trapped."