Rhif ArchifTeitlLefelDisgrifiadCyfrwngDelweddauRhif Archif6418905TeitlCWC_01_01_02 - RCAHMW Collieries Publication CollectionLefelItemDisgrifiadMeasured drawing of cross section through engine and boiler houses at Penallta Colliery. As published on p. 26 of Collieries in Wales: Engineering and Architecture by S. Hughes et alCyfrwngGraphic.Delweddaun
