34Allen, J. Romilly. "Notes on the Antiquities in Co. Kerry Visited by the Royal Society of Antiquaries of Ireland and the Cambrian Archæological Association, August, 1891 (Continued)." The Journal of the Royal Society of Antiquaries of Ireland 2.3 (1892): 284.
The lighthouse workers also were responsible for building some of the modern walls at the monastic site, where they were temporarily housed. (Lavelle, Des. Skellig: Island Outpost of Europe. Montreal: McGill-Queen's UP, 1976. 36.)
On Inishmore in the Aran Islands, the Iron Age fort of Dun Aengus has massive stone buttresses that are entirely the work of 19-century Board of Works architects.