*Abercorn Estate* - Burgesses of the Town of *Strabane* 1730-55 <http://www.cotyroneireland.com/estates/abercorn_burgess.html> *Abercorn Estate* - Petition to the Earl of Abercorn from the Provost & Burgesses of the Corporation of* Strabane* & The Minister and Churchwardens of the Parish, MARCH 27, 1753 <http://www.cotyroneireland.com/estates/abercorn_petition.html> *Spence* Family Notes, Cos. Tyrone & Donegal 1822-1867 <http://www.cotyroneireland.com/surnames/spence.html>