[1][2] He was born and died at Ixworth, Suffolk, though the precise date of his birth is not known.
Nunn was educated at Bury St Edmunds Grammar School and at Emmanuel College, Cambridge.
[3] Nunn played cricket as a tail-end batsman and a bowler; it is not known whether he was right- or left-handed and what his bowling style was, and indeed the bowling figures for his more successful first-class appearance, the game against the Marylebone Cricket Club in which it is known that he took three wickets, are incomplete.
[3] He became a schoolmaster, being second master at Derby Grammar School from 1860.
[6] He became a Church of England priest, but appears not to have held any clerical positions, and died at the age of 33.