on the site. This company worked the quarry until 1875 when the quarry was sold to the Bugail Slate Quarry Company Ltd. under the chairmanship of Thomas Scott of Edinburgh; during this period the quarry was known locally as 'y cwmni Ysgottiad' ("the Scottish Enterprise").

Around 1877 the quarry was taken over by Owen Williams from the nearby village of Penmachno. He ran Cwt y Bugail for the next thirty years and was the great-grandfather of Owen Glyn Williams who managed