Armadale by Wilkie Collins, Fiction, Classics, Suspense

In the German spa town of Wildbad, the 'Scotchman' Mr. Neal is asked to transcribe the deathbed confession of Allan Armadale; his story concerns his murder of the man he had disinherited (also called Allan Armadale), who had subsequently married the woman he was betrothed to under false pretenses. Under Allan's instructions, the confession is left to be opened by his son once he comes of age.