In a novel by this author, the manifestation of a snake from a fireplace leads Orianna to convince her family the world is ending and that only those who remain in the Halloran house will be spared. “MELODY,” “GLOUCESTER,” and “PEGASUS” are the three magic words of a character created by this author who uses “safeguards” such as a box of silver dollars to protect the title place. In a novel by this author of The (*) Sundial, a structure that had stood “for eighty years and might stand for eighty more” begins to display strange messages pleading to “HELP (10[1])ELEANOR COME HOME.” In that novel by this author, Dr. Montague investigates (10[1])the haunting of the title estate. (10[2])For 10 (10[1])points, name this author of We Have Always Lived in the Castle and The Haunting of Hill (10[1])House. ■END■ (10[1]0[2])