At ten o’clock he went to bed.  As he threw open his window before undressing, it seemed to him that he could catch the sound of voices from the sea.  He listened intently.  A grey pall hung everywhere.  To the left, with strange indistinctness, almost like something human struggling to assert itself, came the fitful flash from the light at the entrance to the tidal way.  Once more he strained his ears.  This time there was no doubt about it.  He heard the sound of fishermen’s voices.  He heard one of them say distinctly: 

“Hard aport, Dave lad!  That’s Fentolin’s light.  Keep her out a bit.  Steady, lad!”

Through a rift in the mist, he caught a glimpse of the brown sail of a fishing-boat, dangerously near the land.  He watched it alter its course slightly and pass on.  Then again there was silence.  He undressed slowly and went to bed.

Later on he woke with a start and sat up in bed, listening intently, listening for he knew not what.  Except for the backward scream of the pebbles, dragged down every few seconds by the receding waves, an unbroken silence seemed to prevail.  He struck a match and looked at his watch.  It was exactly three o’clock.  He got out of bed.  He was a man in perfect health, ignorant of the meaning of nerves, a man of proved courage.  Yet he was conscious that his pulses were beating with absurd rapidity.  A new feeling seemed to possess him.  He could almost have declared that he was afraid.  What sound had awakened him?  He had no idea, yet he seemed to have a distinct and absolute conviction that it had been a real sound and no dream.  He drew aside the curtains and looked out of the window.  The mist now seemed to have become almost a fog, to have closed in upon sea and land.  There was nothing whatever to be seen.  As he stood there for a moment, listening, his face became moist with the drifting vapour.  Suddenly upon the beach he saw what at first he imagined must be an optical illusion—­a long shaft of light, invisible in itself except that it seemed to slightly change the density of the mist.  He threw on an overcoat over his pyjamas, thrust on his slippers, and taking up his own electric torch, hastily descended the stairs.  He opened the front door and stepped out on to the beach.  He stood in the very place where the light had seemed to be, and looked inland.  There was no sign of any human person, not a sound except the falling of the sea upon the pebbly beach.  He raised his voice and called out.  Somehow or other, speech seemed to be a relief.

“Hullo!”

There was no response.  He tried again.

“Is any one there?”

Still no answer.  He watched the veiled light from the harbour appear and disappear.  It threw no shadow of illumination upon the spot to which he had gazed from his window.  One window at St. David’s Hall was illuminated.  The rest of the place was wrapped now in darkness.  He walked up to the boat-house.  The door was still locked.  There was no sign that any one had been there.  Reluctantly at last he re-entered the Tower and made his way up-stairs.