Pseudonym of Doris Bell Collier
- Born: 8 December 1897, Manchester, UK
- Died: 24 April 1987
Works
- Murder in Hospital (1937; Dr. Wintringham) **
- Death on the Borough Council (1937; Dr. Wintringham)
- Fall Over Cliff (1938; Dr. Wintringham) ***
- The Port of London Murders (1938; Dr. Wintringham) **
- Death at Half-Term (1939; Dr. Wintringham; also published as Curtain Call for a Corpse) ****
- From Natural Causes (1939; Dr. Wintringham)
- All is Vanity (1940; Dr. Wintringham)
- Trouble at Wrekin Farm (1942)
- Death at the Medical Board (1944; Dr. Wintringham) ****
- Death in Clairvoyance (1949; Dr. Wintringham) **
- The Summer School Mystery (1950; Dr. Wintringham) *
- To Let, Furnished (1952; also published as Strangers on a Cliff)
- Bones in the Barrow (1953; Dr. Wintringham)
- Fires at Fairlawn (1954)
- Death in Retirement (1956) *
- The China Roundabout (1956; ; Dr. Wintringham; also published as Murder on the Merry-go-round) **
- Double Doom (1957) *
- The Seeing Eye (1958; Dr. Wintringham)
- The House Above the River (1959) *
- Easy Prey (1959) *
- A Well-Known Face (1960)
- New People at the Hollies (1961)
- Adventure with Crime (1962)
- A Flat Tyre in Fulham (1963; also published as Fiasco in Fulham and Room for a Body)
- The Hunter and the Trapped (1963)
- The Upfold Witch (1964) **
- No Escape (1965)
- Death on the Reserve (1966)
- The Catalyst (1966) ****
- Death of a Con Man (1968)
- The Wilberforce Legacy (1969) ***
- The Fennister Affair (1969)
- A Hydra with Six Heads (1970)
- A Hole in the Ground (1971) **
- Death of a Poison-Tongue (1972)
- A Pigeon Among the Cats (1974) **
- Victim (1975)
- The Trouble in Hunter Ward (1976)
- Such a Nice Client (1977; also published as The Stroke of Death)
- A Swan-Song Betrayed (1978; also published as Treachery in Type) *
- Wolf! Wolf! (1979)
- A Question of Inheritance (1980)
- The Innocent (1982; also published as A Deadly Place to Stay)