Well, you've definitely picked very helpful ancestors from Wales

That 10 year age difference makes such a difference:
1901 Census RG13 5164 35 4
Bailehanlog, Gwenddwr, Breconshire
John DODD Head 54 Tar Collector and Imperial Shoemaker, b Breconshire Merthyr Cynog, spoke Welsh & English
Margaret Wife 64, b Breconshire Gwenddwr, spoke English
Jones C Son 23 Farmer, b " ", spoke English
Minnie Pugh Serv 15 General Servant Domestic, b " ", spoke English
Perhaps somebody else would like to check John's occupation, but that's what it looks like

1891 Census RG12 4567 61 4
Pengwain, Gwenddwr, Breconshire
John DODD Head 44 Assistant Overseer, b Merthyr Cynog, spoke both
Margaret Wife 54 b Gwenddwr, spoke English
Jones Cynog Son 13 Scholar b Gwenddwr, spoke English
The Pughs are next door with Minnie.
Kind regards
Gaie