Seen as we saw it for the first time that hot evening in March, with the golden lambent light pouring down through the valley, making it in verity a "shell of gold," sitting in Indian chairs on the terrace, with the perfume of roses and jasmines all around us, the valley of the Oreto, Palermo, Sta. Catarina, Monreale,--all were but parts of a dreamy vision, like the heavenly city of Sir Percivale, to attain which he passed across the golden bridge that burned after him as he vanished in the intolerable light of the Beatific Vision. It was all so unreal, so phantasmal, that I was not surprised in the least when, late in the evening after the ladies had gone to their rooms, and the Cavaliere, Tom, and I were stretched out in chairs on the terrace, smoking lazily under the multitudinous stars, the Cavaliere said, "There is something I really must tell you both before you go to bed, so that you may be spared any unnecessary alarm." "You are going to say that the place is haunted," said Rendel, feeling vaguely on the floor beside him for his glass of Amaro: "thank you; it is all it needs." The Cavaliere smiled a little: "Yes, that is just it. Sta. Catarina is really haunted; and much as my reason revolts against the idea as superstitious and savoring of priestcraft, yet I must acknowledge I see no way of avoiding the admission. I do not presume to offer any explanations, I only state the fact; and the fact is that to-night one or other of you will, in all human--or unhuman--probability, receive a visit from Sister Maddelena. You need not be in the least afraid, the apparition is perfectly gentle and harmless; and, moreover, having seen it once, you will never see it again. No one sees the ghost, or whatever it is, but once, and that usually the first night he spends in the house. I myself saw the thing eight--nine years ago, when I first bought the place from the Marchese di Muxaro; all my people have seen it, nearly all my guests, so I think you may as well be prepared." "Then tell us what to expect," I said; "what kind of a ghost is this nocturnal visitor?" "It is simple enough. Some time to-night you will suddenly awake and see before you a Carmelite nun who will look fixedly at you, say distinctly and very sadly, 'I cannot sleep,' and then vanish. That is all, it is hardly worth speaking of, only some people are terribly frightened if they are visited unwarned by strange apparitions; so I tell you this that you may be prepared." "This was a Carmelite convent, then?" I said. "Yes; it was suppressed after the unification of Italy, and given to the House of Muxaro; but the family died out, and I bought it. There is a story about the ghostly nun, who was only a novice, and even that unwillingly, which gives an interest to an otherwise very commonplace and uninteresting ghost." "I beg that you will tell it us," cried Rendel.