The Tell-Tale Heart (1843)
"The Tell-Tale Heart" is a short story by American writer Edgar Allan Poe, first published in 1843. It is relayed by an unnamed narrator who endeavors to convince the reader of his sanity while simultaneously describing a murder he committed. The victim was an old man with a filmy "vulture-eye", as the narrator calls it. The narrator emphasizes the careful calculation of the murder, and he hides the body by dismembering it, and hiding it under the floorboards. Ultimately, the narrator's feelings of guilt, or a mental disturbance, result in him hearing a thumping sound, which he interprets as the dead man's beating heart.
Cover by the lovely @FayLane.