I am trying this again:
Looking for descendants of the Revd Dafydd Williams (1779-1874), minister of Troedrhiwdalar Congregational chapel, Llanafan Fawr. He lived at Bwlch-tua-thre and at Tan-yr-Allt, Glandulas. Established new Congregationalist causes at Beulah and Olewydd. Wondering if any of his descendants are still in the area. Also any information on his biographer, the Revd D. Afan Griffiths (1830-1935) who also ministered at Troedrhiwdalar. And are the three Congregationalist chapels: Troedrhiwdalar, Beulah and Olewydd still open?