"Opened in 1844" - J.H.Davies "History of Pontardawe and district", Llandybie, 1967, p.144.

No registers listed in D.Ifans "Nonconformist Registers of Wales", National Library of Wales, 1994. Possibly registers may have been deposited later than 1994 in which case West Glamorgan Archives is the most likely repository. If nothing there, then they are likely to still be with the chapel trustees.