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lisburn.com
W. Kerr, 'Black Abbey, the archbishops of Armagh and the Church of Derryaghy', Lisburn Historical Society, Vol. 7 (1989), at Society's webpage, at note 6.
persee.fr
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somersetheritage.org.uk
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tcd.ie
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Inspeximus in Patent Roll 12 Richard II, no. 123 (1388-1389), "Calendar of Irish Chancery Letters c. 1244-1509", CIRCLE (Trinity College, Dublin).
Patent Roll 12 Richard II, no. 231 (8 December 1388), "Calendar of Irish Chancery Letters c. 1244-1509", CIRCLE (Trinity College, Dublin).
