1. 1868. Folly built in form of toy castle for Ellin, wife of W. Owen Stanley, M.P.
RCAHMW, 1st October 2002.

2. The garden is depicted on the Second Edition Ordnance Survey 25-inch map of Anglesey XI, sheet 1 (1900).
C.H. Nicholas, RCAHMW, 7th August 2006.

3. This is a dour, castellated, cliff-top folly, commanding spectacular views to seaward. The building is square in plan with a rather advanced tower at the south-east corner. The walls are of roughcast rubble, the flat roof is fringed by crenellations. There are loopholes of questionable utility. Currently used as an information centre and observation tower by the RSPB.
Source: CADW Listed Buildings Database
The garden paths depicted on OS County series 1st edition (Anglesey XI.1 1889) have gone, but the walling remains.
John Wiles, RCAHMW, 30.01.2007.