Control room at Lady Windsor Colliery
Downcast shaft at Lady Windsor Colliery
Two shafts at Lady Windsor Colliery
Machinery at Fernhill Colliery
Underground roadway at Fernhill Colliery
Underground station at Fernhill Colliery
Undermanager at Abercynon Colliery
Auxilliary fans at Abercynon Colliery
Pit bottom at Abercynon Colliery
Drams at Abercynon Colliery
Transfer point at Abercynon Colliery
Conveyor belt at Abercynon Colliery
Locomotive underground at Abercynon Colliery
Turntable at Wyndham Colliery
Chain haulage at Wyndham Colliery
Bunker at Wyndham Colliery
Pit bottom at Wyndham Colliery
Underground stables at Tower Colliery
Underground at Tower Colliery
Conveyor and attendants at Tower Colliery
No.5 shaft at Fernhill Colliery
Rubble underground at Fernhill Colliery
Train underground at Nantgarw Colliery
Gullick Dobson supports at Nantgarw Colliery
Chainless haulage at Nantgarw Colliery
Gullick Dobson chocks at Nantgarw Colliery
Underground roadway at Wyndham Colliery