According to Wikipedia: "Sir Arthur Thomas Quiller-Couch(21 November 1863 – 12 May 1944) was a British writer, who published under the pen name of Q. He is primarily remembered for the monumental Oxford Book Of English Verse 1250–1900 (later extended to 1918), and for his literary criticism. He guided the taste of many who never met him, including American writer Helene Hanff, author of 84 Charing Cross Road, its sequel, Q's Legacy; and the putatively fictional Horace Rumpole via John Mortimer, his literary amanuensis."