Old Shaft depicted on the 1888 1st Edition Ordnance Survey map 180 metres southwest of Girt Farm. [1] Girt Vale Mine. There is a shaft in valley south west of Girt Farm. It was worked for silver lead about 1859 by North Devon Mining Company. [2,3] SS 59573 47268. This shaft, now overgrown with brambles and scrub, in a pasture field between a deep wooded stream gulley on the north and a natural hollow on the south. It was not possible to ascertain if the shaft has been filled in or to obtain any precise details about it. Erosion of the stream to the north is cutting into the side of the immediate area. [4]