The Vampyre by John Polidori was inspired by Lord Byron’s A Fragment, an unfinished novel. Both stories revolve around a promise made. In both stories, the promise is made by the narrator to a dying man.
The vampire in Polidori’s story resembles Lord Byron. The narrator of the story is a traveler who meets a charismatic young man. They have adventures with each other. Until fate happens and the charismatic young man lays dying. Who, makes a strange request that the narrator agrees to, but regrets it the moment he does.
From that time, the narrator’s life is never the same.
The Vampyre was one of the earliest vampire novels written. Published nearly a hundred years before Bram Stoker’s Dracula. It inspired generations of horror writers in the Victorian period alone.
The Vampyre was published in 1819. The audio program I listened to was narrated by Simon Vance.