The Mystery of Cloomber

The Mystery of Cloomber is a gothic mystery novel - one of Arthur Conan Doyle's early forays into suspense and the supernatural. It centers on Cloomber Hall, a gloomy mansion set in the lonely moors of Scotland, recently occupied by the reclusive General Heatherstone and his family. The narrator, John Fothergill West, a young man living nearby, observes peculiar happenings: the General is in a state of constant terror, fortifying the house and anxiously awaiting an unspecified fate.
Whispers of an eerie Eastern curse surround Cloomber. Through West's investigation and the General's eventual confession, the dark secret emerges: years ago in India during the 1857 Mutiny, General Heatherstone committed a grievous act against a group of Buddhist priests. Now, those holy men (or their spectral agents) have tracked him to Cloomber to exact spiritual revenge. The climax occurs on the anniversary of the misdeed: ghostly avengers (or perhaps very real, aged Lamas) confront the General, and his worst fears come true as he meets a bizarre death in the moorlands - found without a mark on his body, as if struck down by supernatural means.
Doyle expertly builds tension with elements like mysterious music on the wind, Heatherstone's erratic behavior, and local legends. While the mystery is explained in a rational way by the end (with the "phantoms" revealed as living monks using psychic powers), the novel retains an ambience of dread. The Mystery of Cloomber combines Doyle's interest in Eastern mysticism with a classic haunted-house narrative, delivering a tale of vengeance that reaches from colonial India to the Scottish hills in uncanny fashion.