3Harding, James D. Picturesque Views of the Antiquities of Ireland. From the Sketches of Robert O'Callaghan Newenham, Esq. 2 vols. London: Thomas and William Boone, 1830.
The authors claim that Bland, the owner of the property, "...with a laudable zeal and good taste, has preserved this singular and interesting structure..." This might indicate that some restoration had occurred. Archaeologist Peter Harbison indicated that was the case in his 1992 Guide to the National and Historic Monuments of Ireland. However Harbison partially retracted that interpretation in a 2006 journal article. (Harbison, Peter. "An Architectural Enigma." Irish Arts Review 23.3 (2006): 100-01.)