¹Allcroft, A. H. The Circle and the Cross a Study in Continuity. Vol. 2. London: Macmillan, 1927. 57-58.

²Buchanan, R. H., and Anthony Wilson. "Downpatrick." Irish Historic Towns Atlas. Vol. 8. Dublin: Royal Irish Acad., 1997.
From an information sign at the site: "It is even possible that all of the earthworks were built as the same time. The mound could have performed a yet-to-be understood functions within a large prehistoric or early historic enclosure. Alternatively, both mound and outer enclosure could have been built by de Courcy, although no comparable Anglo-Norman enclosure in Ireland has been identified."
Information pop-ups in the VR environment also include wording from the on-site signage.

³The Mound of Down. 12 June 2001. Information sign at the site. Downpatrick.
New excavations commencing in 2012 will likely provide a more comprehensive history of the site.

⁴Halpin, Andy, and Conor Newman. "Downpatrick." Ireland: an Oxford Archaeological Guide to Sites from Earliest times to AD 1600. Oxford: Oxford Univ., 2006. 81.

⁵"Downpatrick." Wikipedia, the Free Encyclopedia. Web. 18 Feb. 2011. <http://en.wikipedia.org/wiki/Downpatrick>.

⁶"Down Cathedral." Wikipedia, the Free Encyclopedia. Web. 18 Feb. 2011. <http://en.wikipedia.org/wiki/Down_Cathedral>.

⁷Harbison, Peter, and Peter Harbison. "Downpatrick." Guide to National and Historic Monuments of Ireland: including a Selection of Other Monuments Not in State Care. Dublin: Gill and Macmillan, 1992. 109.

⁸Down Cathedral : The Burial Place of St Patrick. Web. 18 Feb. 2011. <http://www.downcathedral.org/index.cfm?do=page&id=17>.

⁹Allcroft 5, 75

¹⁰"Saint Patrick and the Spring Equinox." Newgrange Stone Age Passage Tomb - Boyne Valley, Ireland. Web. 23 Feb. 2011. <http://www.newgrange.com/saint_patrick.htm>.

¹¹Edward T. "Myths of St. Patrick's Day." History News Network. Web. 18 Feb. 2011. <http://hnn.us/articles/623.html>.

¹²Austin, C. "St. Patrick: The Man and the Myth." The Celtic Connection. Web. 18 Feb. 2011. <http://merganser.math.gvsu.edu/myth/patrick.html>.

¹³Wood-Martin, W. G. Traces of the Elder Faiths of Ireland. Vol. 2. London: Longmans, Green, &, 1902. 311-14.

¹⁴Brash, Richard Rolt, and George M. Atkinson. The Ogam Inscribed Monuments of the Gaedhil in the British Isles. London: G. Bell and Sons, 1879. 95.

¹⁵Bonwick, James. Irish Druids and Old Irish Religions. London: S. Low, Marston & Co., 1894. 12.

¹⁶"Battle for the Body of St. Patrick." Wikipedia, the Free Encyclopedia. Web. 18 Feb. 2011. <http://en.wikipedia.org/wiki/Battle_for_the_Body_of_St._Patrick>.

¹⁷"Downpatrick, County Town of Down." Irish Artists - Irish Art. Web. 18 Feb. 2011. <http://www.loughcuan.com/Pages/downpatrick.htm>.

¹⁸McKay, Patrick. "Downpatrick." A Dictionary of Ulster Place-names. Belfast: The Institute Of Irish Studies, 1999