Located on the edge of the South Wales Coalfield this area was sparsely populated with livestock husbandry being the main occupation. Farmers in their remote farmhouses on the windswept pastures might dig themselves some bucketfuls of coal for their hearth. Things began to change with the development of the iron industry, the start of the Industrial Revolution. In 1752, a 99-year lease was granted for a parcel of land in the Rhymney Valley which gave the lessees the right to mine coal and iron ore. Other such transactions followed, pitshafts were dug and the coal industry developed. By the beginning of the twentieth century, there were forty coalmines in the valley.