 There were few industrial buildings pre @-@ 1850 ; those of note include the 17th @-@ century blast furnace at Pontygwaith which gave the village its name and the fulling mill established by Harri David in 1738 , which in turn gave its name to Tonypandy . Corn mills existed sparsely throughout the valleys as did early coal pits , with two early pits recorded as being opened in 1612 at Rhigos and Cwmparc ; though these would have mined from exposed rock in the hillside and not deep mined . 
