Hen Dy, Waunfawr is of very rough construction, not closely datable, but probably of the eighteenth century. The walls are of rough field stones. The roof is of coarse purple slates laid over moss and bracken and supported on brushwood and rough timbers. It is a rare example of a dwelling of the poorest class of squatter.

(p.254, An Inventory of the Ancient Monuments in Caernarvonshire: Volume II: Central, The Royal Commission on Ancient and Historical Monuments in Wales and Monmouthshire, 1960)