Felin Dyrch is a former corn mill, served by a leat some 540m long from the Afon Cleddau Ddu. The single-storey stone building has a small, all-iron overshot waterwheel, 0.946m (3ft 1?in) wide on the north gable. The internal pit wheel meshed with a bevelled stone nut which drove a single pair of millstones from below. The mill is shown as working on the 1889 and 1907 Ordnance Survey 25in maps but it is not known when it went out of use.
B.A.Malaws, RCAHMW, 19 April 2011.