Sir Arthur Ignatius Conan Doyle (22 May 1859 – 7 July 1930) was a Scottish writer and physician, most noted for his fictional stories about the detective Sherlock Holmes, which are generally considered milestones in the field of crime fiction. “The Firm of Girdlestone” is a novel by British author Sir Arthur Conan Doyle. John Girdlestone owns the firm of Girdlestone. It is a very lucrative busines...