In 1851 Elizabeth Cock (39) of Gwithian, widow, housekeeper, was living in Trevarnen, Gwithian. With her were children (born in Gwithian): Josiah (16), copper miner, John (14), copper miner, James (12), Anthony (9), scholar, Grace (8), scholar, Rebecca (6) [sic], Elizabeth (4), Gregory (2).
In 1861 Elizabeth Cock (48) of Phillack, copper miner's widow, was living in Clyze, Gwithian. With her were children (born in Gwithian): Josiah (26), copper miner, James (22), copper miner, Elizabeth (13), scholar, Gregorey (12), scholar, Martha (9), scholar.
In 1871 Elizabeth Cock (59) of Phillack, widow, housekeeper, was living in Camborne Vean, Camborne. With her were children (born in Gwithian): Anthony (29), tin miner, Martha (19).
In 1881 Elizabeth Cock (69) of Phillack, widow, was living in 10 William St., Camborne. Present was son Anthony (35) of Gwithian, gardener.
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Does not appear in the 1891 Census and was therefore probably the same as 'Elizabeth Cock of Camborne (late of Gwithian)' who was buried in Gwithian on 1 Feb 1885, aged 71 years which, if this is the same Elizabeth Cock, would mean her age was understated by a year or two.