Sir Basil Thomson (1861–1939) was a British colonial administrator and prison governor, born in Oxford. He hailed from an esteemed background, with his father, William Thomson, serving as the provost of The Queen's College in Oxford before later becoming the Archbishop of York. Basil Thomson received his education at New College, Oxford, where he crossed paths with Montague John Druitt, a figure later implicated in the Jack the Ripper case. Despite starting his career in colonial service, Thomson's resignation was prompted by his wife's ailing health in 1893. This marked a significant turning point, leading him to transition into a new role as a writer, drawing inspiration from his experiences in the South Sea Islands.

In June 1913, Thomson assumed the pivotal role of Assistant Commissioner "C" (Crime) within London's Metropolitan Police, ascending to head the Criminal Investigation Department (CID) at New Scotland Yard. With the outbreak of World War I in 1914, Thomson's leadership became instrumental in apprehending spies and addressing the challenges posed by Indian and Irish nationalists. Despite his successes, Thomson's tenure was not without controversy, notably facing accusations of antiSemitism due to his views associating Jews with Bolshevism. Additionally, his involvement in highprofile cases such as that of Mata Hari further solidified his reputation as a formidable figure in law enforcement.

Thomson's literary pursuits included the publication of "Mr Pepper, Investigator" in 1925, a collection of humorous detective stories. Among these tales, "The Vanishing of Mrs. Fraser" stands out as a celebrated work that left a lasting impact on mystery fiction. Thomson's storytelling prowess and wit shine through in these narratives, showcasing his ability to captivate readers with engaging plots and memorable characters. "Mr Pepper, Investigator" serves as a testament to Thomson's multifaceted talents, demonstrating his versatility both as a law enforcement professional and as a writer in the realm of detective fiction.