- Born: 4th November 1862, Mount Abu, India
- Died: 29th December 1960, Broadclyst, UK
Works
- The Grey Room (1921)
- The Red Redmaynes (1922)
- A Voice from the Dark (1925)
- Peacock House and Other Mysteries (1926; short stories)
- The Jury (1927)
- Found Drowned (1931)
- Bred in the Bone (1932; Vol. 1, The Book of Avis) ****
- A Clue from the Stars (1932)
- The Captain’s Curio (1933)
- Witch’s Cauldron (1933; Vol. 2, The Book of Avis)
- Mr. Digweed and Mr. Lumb (1934)
- The Wife of Elias (1935)
- Physician, Heal Thyself (1935; published in the US as The Anniversary Murder)
- A Close Call (1936)
- Lycanthrope: The Mystery of Sir William Wolf (1937)
- Portrait of a Scoundrel (1938)
- Monkshood (1939)
- Awake, Deborah! (1940)
- A Deed Without a Name (1941)
- Ghostwater (1941)
- Flower of the Gods (1942)
- They Were Seven (1944)
- George and Georgina (1952)
As Harrington Hext
- Number 87 (1922)
- The Thing at Their Heels (1923)
- Who Killed Diana? (1924)
- The Monster (1925)