High Quality Content by WIKIPEDIA articles! Nigel de Grey (27 March 1886 – 25 May 1951), CMG, OBE, British codebreaker. Son of the rector of Copdock, Suffolk, and grandson of the 5th Lord Walsingham, he was educated at Eton College and became fluent in French and German. In 1907 he joined the publishing firm of William Heinemann. He married in 1910. As he was shy and physically small, a colleague labelled him `the door mouse`.