¹Bernard, Walter. "Grianan of Aileach." Proceedings of the Royal Irish Academy 15 (1879): 415.

²Bernard.

³Grianan of Aileach." Megalithic Ireland. Web. 19 Mar. 2011. <http://www.megalithicireland.com/Grianan of Aileach.html>.

⁴"Grianan of Aileach - Ringfort - County Donegal." Stone Circles and Megalithic Monuments in the British Isles and Ireland - Megalithics. Web. 19 Mar. 2011. <http://www.megalithics.com/ireland/grianan/granmain.htm>.

⁵Maghtochair. Inishowen: Its History, Traditions,& Antiquities Containing a Number of Original Documents,with Numerous Notes from the Annals of the Four Masters,and Other Sources. Londonderry: Journal Office, 1867. 17-20.

⁶O'Curry, Eugene. On the Manners and Customs of the Ancient Irish. Vol. 3. New York: Lemma Pub., 1971. 8-9.

⁷The Annals of the Four Masters were compiled between 1632 and 1636 at the Franciscan monastery in the town of Donegal. Entries date from the biblical flood, ( 2,242 years after creation) to 1616 CE.

⁸Macalister, R. A. S. "Pre-Celtic Ireland." The Irish Monthly, 46.540 (June, 1918): 330-31.

⁹"Grianan of Aileach." Wikipedia, the Free Encyclopedia. Web. 20 Mar. 2011. <http://en.wikipedia.org/wiki/Grianan_of_Aileach>.

¹⁰The Grianan of Aileach.. 17 June 2010. Information sign at the site. Burt.

¹¹Grianan of Aileach." Megalithic Ireland.

¹²Lacey, Brian. "The Grianán of Aileach: A Note on Its Identification." The Journal of the Royal Society of Antiquaries of Ireland 131 (2001): 148.

¹³The Grianan of Aileach. 17 June 2010.

¹⁴"St. Patrick's Well, Carrowreagh, Donegal." The Northern Antiquarian. 11 Nov. 2009. Web. 20 Mar. 2011. <http://megalithix.wordpress.com/2009/11/11/st-patricks-well-donegal/>.

¹⁵The Grianan of Aileach. 13 July 1979. Information sign at the site. Burt.

¹⁶Cormacan, John O'Donovan, and Robert Payne. The Circuit of Ireland, by Muircheartach MacNeill, Prince of Aileach; a Poem, Written in the Year DCCCCXLII. Dublin: Irish Archaeological Society, 1841. 25

¹⁷Harbison, Peter. Guide to National and Historic Monuments of Ireland: including a Selection of Other Monuments Not in State Care. Dublin: Gill and Macmillan, 1992. 101.

¹⁸Bernard 417.

Note: the two illustrations in the web gallery were taken from The Book of Inishowen; the "St. Columb's Stone" from p. 9, and the "Grianan Plan" from p. 88.
Swan, Harry Percival., and William J. O'Doherty. The Book of Inishowen; a Guide Book and Conspectus of Information Relating to the Barony of Inishowen, County Donegal. Buncrana, Co. Donegal: W. Doherty & Co., 1938.
The Belmont House School has a web page with more information about St. Columb's Stone.