As far back as 1659 (Census of Ireland) this townland was known as Agharrin; later on it was known as Achadh Guirthin or Achadh Urthin "field of the suret" (1833). This townland is known for a fort on a hill and the remains of a sandstone quarry which was used to supply headstones for the local graveyards. The townland contains karst features which include the shake hole known as Pollkeeran and a rattle hole known as Murphy's Hole. as well as a Scheduled Historic Monument: a Bivallate rath, grid ref: H1185 4573.
- "Place Names NI – Aghahoorin". Placenamesni.org. 20 January 2010. Archived from the original on 17 March 2012. Retrieved 26 July 2010.
- Boho Heritage Organisation (2009). Edel Bannon, Louise McLaughlin, Cecilia Flanagan, eds. Boho Heritage: A treasure trove of history and lore. Nicholson & Bass Ltd, Mallusk, Northern Ireland. p. 246. ISBN 978-0-9560607-0-9.
- "Scheduled Historic Monuments (to 15 October 2012)" (PDF). NI Environment Agency. Archived from the original (PDF) on 26 October 2013. Retrieved 13 November 2012.
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