Referred to by the Geological Survey in 1907 (1). Coal was extracted from the Astell Vein which immediately overlies the Farewell Rock in Cwm Garw, `where it was once worked?. A coal level is shown at the given NGR, in the south-east side of the river cutting, on the first edition OS plan 1880s, when preumably it was still operating.
(1) Strahan et al. 1907. The Geology of the South Wales Coalfield: The Country around Ammanford vii. Geological Survey Memoir,
p.104.

David Leighton, RCAHMW, 17 February 2011