Williams, E. H., and Sons, drapers, London House, Ystrad Mynach records "Business records of E. H. Williams and Sons, including: diaries, 1904-1933; bank books, 1914-1928; purchase book, 1914-1917; cash books, 1917-1931; accounts of goods returned, 1914-1917; credit book, 1923-1936; staff attendance book, 1922-1935; catalogues and brochures, [1920s]-[1940s]; and photograph of London House, [c. 1930]."
The church is dedicated to Holy Trinity, is in the Benefice of Ystrad Mynach with Llanbradach, and the diocese of Llandaff. Details of the present incumbent of this benefice can be found at the Church in Wales website. The church can be located at grid reference ST144942.
Thomas family, of Llanbradach and Ystrad Mynach estates, records "Deeds and documents relating to the Llanbradach, Ystrad Mynach and Tredomen estates in Glamorgan, [c. 1528]-[c. 1944], and to a lesser extent, Monmouthshire, 1701-1942; and to the Pencerrig estate in Breconshire, 1680-1933, and Radnorshire, 1574-1923; ..............................."
You can see maps centred on OS grid reference ST145943 (Lat/Lon: 51.640934, -3.237002), Ystrad Mynach which are provided by: