The Uninvited

1777: In the throes of the Revolutionary War, Landon Mansion is commandeered by British Lord “Butcher” Bedford. He stabs Lucy Tarleton — who spurned his king and his love — leaving her to die in her father’s arms.

Now: After the day’s final tour, docent Allison Leigh makes her rounds while locking up…and finds a colleague slumped over Bedford’s desk, impaled on his own replica bayonet.

Resident ghosts may be the stock-in-trade of stately Philadelphia homes, but Allison — a noted h…