In matter of age, she frankly volunteered the information that she was forty-five; but her briskness, her activity, her unravaged skin, her coal-black hair, made it difficult to believe that she was not adopting an unusual device, and adding ten years on to her age instead of subtracting them. Often, also, as our quite unsentimental friendship ripened, Mrs. Amworth would ring me up and propose her advent. If I was busy writing, I was to give her, so we definitely bargained, a frank negative, and in answer I could hear her jolly laugh and her wishes for a successful evening of work. Sometimes, before her proposal arrived, Urcombe would already have stepped across from his house opposite for a smoke and a chat, and he, hearing who my intending visitor was, always urged me to beg her to come. She and I should play our piquet, said he, and he would look on, if we did not object, and learn something of the game. But I doubt whether he paid much attention to it, for nothing could be clearer than that, under that penthouse of forehead and thick eyebrows, his attention was fixed not on the cards, but on one of the players. But he seemed to enjoy an hour spent thus, and often, until one particular evening in July, he would watch her with the air of a man who has some deep problem in front of him. She, enthusiastically keen about our game, seemed not to notice his scrutiny. Then came that evening, when, as I see in the light of subsequent events, began the first twitching of the veil that hid the secret horror from my eyes. I did not know it then, though I noticed that thereafter, if she rang up to propose coming round, she always asked not only if I was at leisure, but whether Mr. Urcombe was with me. If so, she said, she would not spoil the chat of two old bachelors, and laughingly wished me good night. Urcombe, on this occasion, had been with me for some half-hour before Mrs. Amworth’s appearance, and had been talking to me about the mediæval beliefs concerning vampirism, one of those borderland subjects which he declared had not been sufficiently studied before it had been consigned by the medical profession to the dust-heap of exploded superstitions. There he sat, grim and eager, tracing, with that pellucid clearness which had made him in his Cambridge days so admirable a lecturer, the history of those mysterious visitations. In them all there were the same general features: one of those ghoulish spirits took up its abode in a living man or woman, conferring supernatural powers of bat-like flight and glutting itself with nocturnal blood-feasts. When its host died it continued to dwell in the corpse, which remained undecayed. By day it rested, by night it left the grave and went on its awful errands. No European country in the Middle Ages seemed to have escaped them; earlier yet, parallels were to be found, in Roman and Greek and in Jewish history.