Hi Dave

without knowing the children's names it's a bit difficult, as there are so many entries for Jones. Going on the ages and the address of John and Margaret this might be the family you are looking for.
Rhydlas Nantcwnlle
John Jones, head, mar, 43, Carpenter & Farmer, Llanbadarn Cardiganshire
Margaret, wife, 38, Llasanffraid Cardiganshire
Elizabeth, dau, un, 16, Farmer's daughter, Nantcwnlle
Ann, dau, 10, Scholar, Nantcwnlle
Thomas, son, 8, Scholar, Nantcwnlle
Margaret, dau, 7, Scholar, Nantcwnlle
Stephen, son, 2, Nantcwnlle
Mary, dau, 2, Nantcwnlle
Hugh, son, 6 months, Nantcwnlle
RG12/4563
Folio: 85
Page: 11
Regards
Darcy