Hi
Having looked at the later census info I took Sarah who was married to mr Squire info to find her on the 1901 census
Rg13 piece 5018 folio 45 page 31
Frank Lewis head married b 1870 taunton somerset coal hewer
sarah a wife b 1871 abertillery mon
arthur geo son b 1893 dinas rhondda
bertie son b 1897 dinas
Thomas Rees father-in-law b 1836 army pensioner b Bristol somerset
Sarah Rees mother-in-law b 1846 clee hill shropshiremary ellen lewis marriedvisitor b 1877 ynys owen glam
agnes m lewis single b 1897 dinas
hope this is of some help
cheers cardiff

ps 1891 census gives THomas as a coal miner b 1835 Rg12 /4418/98/40