Andrew Hunter Dunn was born in 1839 at Saffron Walden, Essex, England. After graduating from Christi College, Cambridge he was appointed curate of St Mark’s, Notting Hill in 1861. He was priested in 1865 and in 1871 was appointed to All Saints’, South Acton, London. Here over 21 years he erected 2 permanent churches, a temporary church, six mission churches, as well as schools and parsonage. In 1866 he married Alice, daughter of William Hunter, and they had 5 sons and 2 daughters.
September 18, 1892, Andrew Dunn was consecrated as the fifth Bishop of Quebec in Christ Church Cathedral, Montreal by Bishop John Travers Lewis of Ontario. In 1907 he was a D.C.L. of Bishop’s College, Lennoxville. He continued in charge of the diocese until his death at sea on November 14, 1914.