In 1983, with Dr Anthony Farquhar he was appointed Auxiliary Bishop of the Diocese of Down and Connor and was consecrated on 15 May by Bishop Cahal Daly, Archbishop Gaetano Alibrandi and Bishop William Philbin. During the ordination ceremony, the assistant priests to Bishop Walsh were Fr Charles Agnew and Fr Hugh Crossin.
In 1983, Dr Anthony Farquhar was appointed as an auxiliary bishop of the Diocese of Down and Connor and consecrated on May 15th by Bishop Cahal Daly, Archbishop Gaetano Alibrandi, and Bishop William Philbin. During the ordination ceremony, Fr Charles Agnew and Fr Hugh Crossin served as assistant priests to Bishop Walsh.