[1] He was educated at Harrow and King's College, Cambridge, where he took part in stagings of Handel oratorios in the 1930s.
He considerably rewrote his 1948 book on Bizet in 1965 due to new material and music of the composer which had since emerged.
[2] From 1965 he wrote articles criticizing the Oeser edition of Carmen, listing many mistakes, describing it as "a musicological disaster of the first magnitude", and continued to point out its errors in reviews of subsequent performances and recordings.
[3] In the 1954 Grove he contributed an extended essay on 'criticism', ending with a long list of the necessary qualifications for a critic.
[1] Dean contributed heavily to a number of musicological publications, including The Musical Times and Opera, as well as to The Listener and record sleeve notes.