The Tyddyn-y-barcud Vein extended east to west across these setts, while the North Hendre Vein ran in a north-south direction, intersecting the workings. Smith (1921) references seven shafts situated along the Tyddyn-y-barcud Vein, namely Robert’s, Pritchard’s, Eyton’s, Williamson’s, Marquis, Tyddyn-y-barcud, and Ddol. Many of these shafts can still be traced through the woodland.

The South Hendre Mining Company recorded returns between 1869 and 1871, while the West Hendre Mining Company operated from 1902 to 1904. The remnants of these mining activities, including shafts and spoil mounds, can still be found to the south of the Hendre Valley and along the A541 road. The first edition Ordnance Survey map, surveyed between 1869 and 1871, identifies several shafts around SJ 1865 6760 as part of Efail Parcy Lead Mine. Further east, the shaft at SJ 1915 6755 is depicted as a large whim shaft.