Edinburgh, Holyrood Park, General and Perimeter Wall, su canmore.org.uk, National Record of the Historic Environment. URL consultato il 15 settembre 2010.
«Holyrood Park [...] was created in 1541 by James V when he had the ground 'circulit about Arthurs Sett, Salisborie and Duddingston craggis' enclosed by a stone wall»
