The Ghost of Guir House by Charles Willing Beale

When a man answers a letter that was not addressed to him, he is invited to Guir House in Virginia. Upon his arrival, he discovers all is not as it should be. Slowly but inexorably the plot turns, with digressions involving Theosophy, hypnotism, and emanationism, building inexorably toward a memorable—and unexpected—climax. A classic Victorian ghost story, first published ni 1897.