Mademoiselle De Lafontaine – in right of her father, who was a German, assumed to be psychological, metaphysical and something of a mystic – now declared that when the moon shone with a light so intense it was well known that it indicated a special spiritual activity. The effect of the full moon in such a state of brilliancy was manifold. It acted on dreams, it acted on lunacy, it acted on nervous people; it had marvelous physical influences connected with life. Mademoiselle related that here cousin, who was mate of a merchant ship, having taken a nap on deck on such a night, lying on his back, with his face full in the light of the moon, had wakened, after a dream of an old woman clawing him by the cheek, with his features horribly drawn to one side; and his countenance had never quite recovered its equilibrium.
J. Sheridan Le Fanu, Carmilla
horror, moon, nightmare