Doom of the House of Duryea by Earl Peirce Jr., Science Fiction, Fantasy

A powerful story of stark horror, and the dreadful thing that happened in a lone house in the Maine woods. . . . "Then you've been following my work?" the younger man -- the son -- asked. "Yes, Arthur; I've received monthly reports ever since you left me. From now on, son, we shall be the closest of companions -- unless your Aunt Cecilia has succeeded in her terrible mission." The mention of that name caused an unfamiliar chill to come between the two men. It stood for something, in each of them, which gnawed their minds like a malignancy. But to the younger Duryea, in his intense effort to forget the awful past, her name as well as her madness must be forgotten. "Cecilia is dead, and her silly superstition is dead also. From now on, Dad, we're going to enjoy life as we should. Bygones are really bygones in this case." But Cecilia was not dead. Some things -- some "people" -- are not that easy to be done with.