I'm afraid I can't decipher the birthplaces for Selia and children - terrible writing - I suspect that we might need somebody with more Welsh experience than I to look at them
RG12/4430 folio 110 page 58
Here's my interpretation:
schedule 292
56 Pentre Rd, Tylorstown with Ferndale (part of)
WILLIAMS Benj, head, m, 28, Coal Miner, Glam Britton Ferry, English
WILLIAMS Selia, wife, m, 24, -, Monmouthshire, both
WILLIAMS Dd, son, -, 3, -, Glam Garw Valley, both
WILLIAMS Mary, dau, -, 15 mths, -, Glam Mardy, -
WILLIAMS John, boarder, s, 29, Coal Miner, Glam Britton Ferry, both
EVANS Thos, boarder, s, 27, Coal Miner, Glam Britton Ferry, both