«The Alchemist » by Howard Lovecraft

"The Alchemist" is a short story by American writer H. P. Lovecraft. It was written in 1908, when Lovecraft was 17 or 18, and first published in the November 1916 issue of the United Amateur.
The story is recounted by the protagonist, Count Antoine de C, in the first person. Hundreds of years ago, Antoine's noble ancestor was responsible for the death of a dark wizard, Michel Mauvais. The wizard's son, Charles le Sorcier, swore revenge on not only him but all his descendants, cursing them to die on reaching the age of 32.
The protagonist recounts how his ancestors all died in some mysterious way around the age of 32. The line has dwindled and the castle has been left to fall into disrepair, tower by tower. Finally, Antoine is the only one left, with one poor servant, Pierre, who raised him, and a tiny section of the castle with a single tower is still usable. Antoine has reached adulthood, and his 32nd year is approaching.
His servant eventually dies, leaving him completely alone, and he begins exploring the ruined parts of the castle. He finds a trapdoor in one of the oldest parts. Below, he discovers a passage with a locked door at the end. Just as he turns to leave, he hears a noise behind him and sees that the door is open and someone is standing in it. The man attempts to kill him but Antoine kills him first. His dying words reveal that he is none other than Charles, who actually managed to successfully fabricate the elixir of life, enabling him to personally fulfill the curse generation after generation.
Famous works of the author Howard Phillips Lovecraft: At the Mountains of Madness, The Dreams in the Witch House, The Horror at Red Hook, The Shadow Out of Time, The Shadows over Innsmouth, The Alchemist, Reanimator, Ex Oblivione, Azathoth, The Call of Cthulhu, The Cats of Ulthar, The Dunwich Horror, The Doom that Came to Sarnath, The Festival, The Silver Key, The Other Gods, The Outsider, The Temple, The Picture in the House, The Shunned House, The Terrible Old Man, The Tomb, Dagon, From Beyond, What the Moon Brings.