17Trench, C.E.F. Slane: Slane Town Trail, Newgrange. Slane: An Taisce, 1995, 14-23.
According to Matthew Seaver, "The large numbers of gargoyles, heraldry and carved heads in contemporary dress communicated an unconscious code of loyalties and morals." (Seaver, Matthew. “Practice, Spaces and Places:an Archaeology of Boroughs as Manorial Centres in the Barony of Slane.” The Manor in Medieval and Early Modern Ireland, by James Lyttleton and Tadhg O'Keeffe, Dublin: Four Courts, 2005, 87-9.)