Beresford employed Lewis Nockalls Cottingham, one of the most skilled architects at that time, to restore Armagh's St Patrick's Cathedral. Cottingham removed the old stunted spire and shored up the belfry stages while he re-built the piers and arches under it. The arcade walls which had fallen away as much as 21 inches from the perpendicular on the south side and 7 inches on the North side, were straightened by means of heated irons, and the clerestory windows which had long been concealed, were opened out, and filled with tracery.[citation needed]
Beresford is unsympathetically represented by Montalembert with whom he had breakfast at Gurteen de la Poer during his tour of Ireland.
Beresford died at Woburn, the home of his niece,[6] in the parish of Donaghadee.[2] There is a memorial to him in the south aisle at St Patrick's.[7] His immediate successor as Archbishop was his first cousin once removed.
^ abArthur H. Grant, ‘Beresford, Lord John George de la Poer (1773–1862)’, rev. Kenneth Milne, Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, Jan 2008 accessed 10 Aug 2015
^ abcdefgDod, Robert P. (1860). The Peerage, Baronetage and Knightage of Great Britain and Ireland. London, UK: Whitaker and Co. p. 92.
^" A Compendium of Irish Biography." Webb, A. (Dublin: M. H. Gill & son. 1878)
^Clogher clergy and parishes : being an account of the clergy of the Church of Ireland in the Diocese of Clogher, from the earliest period, with historical notices of the several parishes, churches, etc" Leslie, J.B. pp 22/3: Enniskille; R. H. Ritchie; 1929