Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Margam Estate (Wales), 1 canlyniadau
- Melincourt Furnace (Resolven, Wales), 1 canlyniadau
- Penrhywtyn Furnace (Llantwit-juxta-Neath, Wales), 1 canlyniadau
- Wortley Ironworks (Barnsley, England), 1 canlyniadau
- Glamorgan and Monmouthshire Canal, 1 canlyniadau
- Bush, Walker & Wade, 1 canlyniadau
- Thomas Price & Co., 1 canlyniadau
- Talbot, Thomas Mansel, Penrice Castle, 1 canlyniadau
- Tyler, Thomas, Margam, Glamorgan, The Elder/Gent, 1 canlyniadau
- Vernon, George Venables-Vernon, Baron, 1735-1813, 1 canlyniadau
- Pob un
- Coal mines and mining -- Wales -- Glamorgan, 1 canlyniadau
- Iron industry and trade -- Wales -- Glamorgan., 1 canlyniadau
- Iron-works -- Wales -- Glamorgan., 1 canlyniadau
- Mines and mineral resources -- Wales -- Glamorgan, 1 canlyniadau
- Clay industries -- Wales -- Glamorgan, 1 canlyniadau
- Furnaces -- Wales -- Glamorgan, 1 canlyniadau
- Estates -- Wales -- Glamorgan, 1 canlyniadau
- Copper industry and trade -- England, 1 canlyniadau
- Iron-works -- England -- Barnsley, 1 canlyniadau
- Iron industry and trade -- England -- Barnsley, 1 canlyniadau
