Archibald Joseph Cronin (19 July 1896 – 6 January 1981), known professionally as A. J. Cronin, was a Scottish physician and novelist. His best-known novel The Citadel (1937) tells of a Scottish doctor in a Welsh mining village, who then shoots up the medical ladder in London. Cronin knew both venues, as a medical inspector of mines and as a doctor in Harley Street. The book describes some controversial medical ethics that helped to inspire the National Health Service. Another popular mining novel of his, set in the North East of England, is The Stars Look Down. Both have been filmed, as have Hatter's Castle, The Keys of the Kingdom and The Green Years. His 1935 novella Country Doctor inspired a long-running BBC radio and TV series, Dr. Finlay's Casebook (1962–1971), set in the 1920s. There