Input (grade 13): 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.
Output (grade 5): 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.