Original: In 1841 the family was living at Illogan, Cornwall, but by 1848 Johns had migrated to Wales, taking work as an iron ore miner, probably at the Clydach Iron Works.
Simplified: In 1841 the family was living at Illogan, Penwith, Cornwall. By 1848 Johns had moved to Wales, working as an iron ore miner, at the Clydach Iron Works.