In 1841 John Trewhela, aged about 40, born in the county, butcher, and wife Sally, aged about 25, born in the county, were living in Carne Tremayne, Crowan, Cornwall. With them were children: Mary (6), Thomas (5), Sally (3), John (9m), female servant Elizabeth Pascoe (14)
In 1851 John Trewhela, aged 50, born in Gwinear Cornwall, butcher, and wife Sally, aged 40, born in Sithney Cornwall, were living in Praze Crowan. With them were children (born in Crowan): Thomas (14), Sally (11), John (9), Benjamin (7), Elizabeth (6), Edward (1)
In 1861 John Trewhela, aged 60, born in Crowan, butcher, widower, was living in Trethannas, Crowan. With him were children (born in Crowan): Sally (21), John (19), butcher, Benjamin (18), miner, Elizabeth (17)
In 1871 John Trewhella, aged 71, born in Gwinear, butcher, widower, was living in Trethanas, Crowan. With him was daughter Sarah Trewhella (29) of Crowan, housekeeper
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