Paul R Davis, in his "Hearth and Home - The Story of the Welsh Home" has a brief note of one of the Neolithic buildings, describing it as "one of the oldest houses in Wales". There are post holes cut into the rock, and the building exploited the lie of the land, so in fact it was probably a better home than many in Wales in the C18th and C19th. There are also excellent aerial photos on the RCAHMW site.
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