Disgrifiad
Llwyn-Derw, Abergwesyn: sketch plan of the building, first published in Brycheiniog 1963, Jones and Smith, 'The Houses of Breconshire', p. 48. With note saying: 'Stanley Jones Collection, c.1960, Breconshire, Neg. No. BB 66/274. For original copy see: Gledrydd, Llandulas [NPRN 25539],'
