Born Morna Doris McTaggart in Rangoon, Burma of a Scottish father and an Irish-German mother, she grew up in England where she moved at age six. She attended Bedales school and then took a diploma in journalism at London University.
Her first two novels, 'Turn Single' (1932) and 'Broken Music' (1934), came out under her own name, Morna McTaggart. In the early 1930s she married her first husband but she left him, moved to Belsize Park in London and lived with Dr Robert Brown, a lecturer in botany at Bedford College in 1942. She eventually divorced her first husband in October 1945 and married Dr, later Professor, Brown.
It was in 1940 that her first crime novel 'Give a Corpse a Bad Name' was published under the pseudonymn that she had adopted, Elizabeth (sometimes Elizabeth X. - particularly in the USA) Ferrars, the Ferrars her mother's maiden name. This novel featured her young detective Toby Dyke, who was to feature in four other of her novels.
When her husband was offered a post at Cornell University in the USA, the couple moved there but remained only a year before returning to Britain. They travelled with her husband's work, on one occasion visiting Adelaide when he was a visiting professor at the University of South Australia, and later moved to Edinburgh where her husband was appointed Regius Professor of Botany and they lived in the city until 1977 when, on her husband's retirement, they moved to Blewsbury in Oxfordshire where they lived until her sudden death in 1995.
She continued to write a crime novel almost every year and in 1953 she was a founding member of the Crime Writers' Association of which she later became chairperson in 1977.
As well as her short series of works featuring Toby Dyke, she wrote a series featuring retired botanist Andrew Basnett and another series featuring a semi-estranged married couple, Virginia and Felix Freer. All in all she wrote over seventy novels, her final one 'A Thief in the Night' being published posthumously.
Jacques Barzun and Wendell Hertig Taylor described her as having "a sound enough grasp of motives and human relations and a due regard for probability and technique, but whose people and plot are so standard".
Many red herrings again but this time I guessed the correct murderer. The hint of a romance at the end seemed superfluous but as another of her books I have calls itself a romance, I suppose it wasn't entirely out of place.
I thought this was great! I’m now on an E.X. Ferrars kick, and I loved this. Did not see this ending coming — and the whole story was so concise, yet with such rich characters. An excellent cozy.
Professor Matthew Tierney is unhappily married to a woman who has just inherited a fortune. Luckily for him, he has a perfect alibi covering the time when she was murdered. Not that the police are ready to write him off yet. Matthew goes to stay in the remote coastal cottage of his older sister and brother-in-law, his best friend since schooldays, where he begins to suspect that their neighbor is involved in his wife's death. When the neighbor dies, Matthew doesn't have an alibi...