The archdeaconry can trace its history from Giolla Domhnaill O'Foramain, the first known incumbent, who held the office in 1179"Fasti Ecclesiae Hibernicae: The succession of the prelates Volume 3" Cotton, H. p336 Dublin, Hodges & Smith, 1848–1878 to the current incumbent Robert Miller.Londonderry Sentinel McBride is responsible for the disciplinary supervision of the clergy and the upkeep of diocesan property within his half of the diocese."ABCD: a basic church dictionary" Meakin, T: Norwich, Canterbury Press, 2001
