Which Poet Laureate wrote mystery stories under the pseudonym Nicholas Blake?

Cecil Day-Lewis (or Day Lewis) CBE (27 April 1904 – 22 May 1972) was an Anglo-Irish poet and the Poet Laureate of the United Kingdom from 1968 until his death in 1972. He also wrote mystery stories under the pseudonym of Nicholas Blake. He was the father of actor Daniel Day-Lewis and documentary filmmaker and television chef Tamasin Day-Lewis.

In 1935, Day-Lewis decided to supplement his income from poetry by writing a detective novel, A Question of Proof, in which he created Nigel Strangeways, an amateur investigator and gentleman detective who, as the nephew of an Assistant Commissioner at Scotland Yard, has the same access to, and good relations with, official crime investigation bodies as those enjoyed by other fictional sleuths such as Ellery Queen, Philo Vance and Lord Peter Wimsey. This was followed by nineteen more crime novels. (In the first Nigel Strangeways novel, the detective is modelled on W. H. Auden, but Strangeways becomes a far less extravagant and more serious figure in later novels.) From the mid-1930s Day-Lewis was able to earn his living by writing. Four of the Blake novels – A Tangled Web, Penknife in My Heart, The Deadly Joker, The Private Wound – do not feature Strangeways.