Daly later remarked that he shared much common ground with the two, particularly McGuinness, with whom he only substantially disagreed on the morality of using violence to achieve political aims. Despite the tension between Catholics and Protestants in Northern Ireland, Daly maintained a personal friendship with James Mehaffey, the Anglican (Protestant) Bishop of Derry and Raphoe from the latter's appointment in 1980, which was described after Daly's death as "a powerful message of harmony and bridge-building". Among many joint projects Daly and Mehaffey co-founded two charities with the intent to promote community healing in Derry after years of sectarian violence. He retired from his position as Bishop of Derry in October 1993, after suffering a stroke. He was succeeded by Bishop Séamus Hegarty and in retirement took up the post of chaplain at Foyle Hospice. Later life Daly published an autobiography, Mister, Are you a Priest?, in 2000. This he followed with a second memoir, A Troubled See: Memoirs of a Derry Bishop, published in 2011. He was also the author of Do Not Let Your Hearts Be Troubled, co-author of The Clergy of the Diocese of Derry: an Index and contributed an essay to A History of the Diocese of Derry. In A Troubled See, Daly discussed ending the compulsory celibacy for Roman Catholic priests; his view was that allowing priests to marry could alleviate the church's problems recruiting new priests. He was distressed that, despite a shortage of priests, priests were forced to resign or otherwise good candidates were rejected because of the celibacy rule; he felt that there was "certainly an important and enduring place for celibate priesthood. But I believe that there should also be a place in the modern Catholic Church for married priesthood and for men who do not wish to commit themselves to celibacy". The Association of Catholic Priests publicly supported his stance. Daly later clarified that he valued his own vow of celibacy, and that it enhanced his own life as a priest. He said, "I am not saying that celibacy should be abolished—I am saying to look at other people who feel they would not be able to live up to a vow of celibacy or undertake it and to look at the possibilities of introducing them to the priesthood [...] but I feel that the church must look at this again". He received criticism from some quarters for waiting until