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The House Beneath the Tide

Book 4 in The Silas Vance Mysteries

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by P M Charles

A condemned mansion. A sealed room. A murder hidden by the Thames for twelve years. When demolition workers break through a wall in Harcourt House, they discover a windowless room containing a human skeleton. The door had been locked from the outside and plastered over years earlier. There is no other entrance, and no apparent way the dead man could have entered. Dr Silas Vance identifies the remains as those of a river surveyor who vanished while investigating secret works beneath the Thames. Concealed among the bones is evidence bearing the mark of the divided crown, the shadowy organisation Vance has encountered before. Then a second man dies. With the mansion scheduled to be destroyed within forty-eight hours, Vance must reconstruct a building whose rooms have been moved, plans falsified and foundations claimed by the tide. Somewhere beneath the house lies a secret passage, a hidden history and the truth about two murders committed twelve years apart. But someone intends to ensure that when Harcourt House falls, its secrets disappear with it. The House Beneath the Tide is the fourth Silas Vance Mystery, an atmospheric Victorian tale of maritime crime, medicine and traditional detection.

Publication date: August 13, 2026