His A question of proof, 1990 CIP t.p. (Nicholas Blake)
Dic. of Irish lit., 1969 (Day-Lewis, Cecil, 1904-1972; pseud.: Nicholas Blake)
Wikipedia, Dec. 2, 2007 (Cecil Day-Lewis (or Day Lewis) CBE (27 April 1904-22 May 1972) was an English poet, the British Poet Laureate between 1968 to 1972, and, under the pseudonym of Nicholas Blake, a mystery writer. He is the father of the actor Daniel Day-Lewis and the TYV star Tamasin Day-Lewis)
