1. Small building (stone) located 1m south of tramroad (Pwll du Quarry)
Source: Cadw Industrial Landscape Survey

2. Pwll-du Quarries: nprn 85859
B.A.Malaws, 22 June 1999
3. Ruined single-unit building of roughly coursed stone.
Site visited, 2000.06.30/H&H/WH.