Jurgen by James Branch Cabell

Now it befell that for three nights in succession the Princess Guenevere was unable to converse with Jurgen in the Hall of Judgment. So upon one of these disengaged evenings Duke Jurgen held a carouse with Aribert and Urien, two of Gogyrvan's barons, who had just returned from Pengwaed-Gir, and had queer tales to narrate of the Trooping Fairies who garrison that place.

All three were seasoned topers, so Jurgen went to bed prepared for anything. Later he sat up in bed, and found it was much as he had suspected. The room was haunted, and at the foot of his couch were two ghosts: one an impudent-looking leering phantom, in a suit of old-fashioned armor, and the other a beautiful pale lady, in the customary flowing white draperies.