The last English Bishop of Nassau was Bishop Bernard Markham who lived at Addington House from 1962 to 1972. The house was re-roofed and refurbished during his time. The West Building became the administrative centre for the Diocese and the upper story was used as a conference room.

Markham was an anti-colonialist who did much to prepare the Church and its people for the coming of independence. He encouraged vocations to the priesthood among Bahamians and was dedicated to deepening the spiritual lives of the clergy and laity.