Almost all of the southern third of the National Trust land (the entire hill) and an area at the base of the cliff on the SE has evidence for mining. There are two distinct forms ie deep mines and open quarries or slots. The sites at the SE are mainly mines and look at first glance to be natural solution caves, but even if they are partly such all appear to have been mined. The workings consist of deep holes and pits following fault lines in the limestone. Two are marked on the 2nd edition 25 inch map as "Old Shafts" - these survive and there are several others at the base of the hill - especially at a point immediately to the W of the summit trig. point where there are four or five obvious holes. One entrance has been partially obliterated by the building of the railway embankment. On the rest of the property the mining is revealed in a large number of open pits, slots and spoil heaps. Some of these are in woodland and some in the open area to the SE. As well as the concentration at the S there is a detached area of mining near the centre of the hill. There is some geographical overlap between these quarried areas and the area containing various banked enclosures but in every case the quarries or mines have cut into or through the banks. Many of the pits and slots have been filled with rubble - possibly some of the remains of Graig Fawr Farm and the whole area has been thoroughly disturbed by wartime tank training. All are essentially part of the Talargoch Mine of which the Graig Fawr workings are simply the major part of a more extensive whole, extending to the NE and the SW.

John Latham RCAHMW 05 February 2013