There was no one there.

The clock on the landing pointed to twenty minutes past one.

Mrs.Claughton went back to bed, read a book, fell asleep, and woke to find the candle still lit, but low in the socket.

She heard a sigh, and saw a lady, unknown to her, her head swathed in a soft white shawl, her expression gentle and refined, her features much emaciated.
"The Appearance said, 'Follow me,' and Mrs.Claughton, taking the bedroom candle, rose and followed out on to the landing, and so into the adjacent drawing-room.

She cannot remember opening the door, which the housemaid had locked outside, and she owns that this passage is dreamlike in her memory.