Andrew stopped, and for some minutes the silence was broken by the rustle of the flapping topsail and the soft splash at the bows. It had grown dark and the sea was faintly phosphorescent: pale blue and green spangles glimmered down the wake. Ross Island had faded into the black head behind it, but a bright beam of light still glittered across the water.

"On the face of it, the reason you were wrecked is obvious," Whitney said. "The boat began to strain when she was pounding, overpressed with sail, through a steep head sea, and you couldn't pump her out. Besides, as she'd just been hauled up for repairs, a butt may have got started by the hammering or a seam have been left open."

"The carpenter was a good workman," Andrew replied quietly.

"He may have neglected something, for all that. Boats will leak when they're driven hard; pumps get out of order; and a stranger might nail down a floor board you kept loose. The curious point is that all these things should happen together." Whitney paused and smiled. "Of course, if you had some dangerous secret or were heir to a great estate that somebody else wanted, one might suggest a melodramatic explanation."

"I've no secret anybody would give twopence for, and I inherit nothing except a very small annuity."

"Then you'll have to put the series of accidents down to coincidence. Where were you bound for when you came to grief?"

Andrew glanced back toward a stretch of water that still shone faintly among the shadowy hills.

"Up yonder, near the head of Wigtown Bay, to shoot geese. Dick was to come on by train and join me. He's fond of wildfowling, and I took advantage of it to get him away."

"Away from what?"

Andrew hesitated.