The Pembroke Mason Affair is a novel written by George Barton and published in 1920. The story is set in the early 20th century and follows the investigation of a mysterious murder in the small town of Pembroke. The victim is a wealthy businessman and prominent member of the Masonic Lodge, and the suspects are all members of the same Lodge. The investigation is led by a young detective named John Thorndyke, who must navigate the complex web of Masonic...