In 1841 John Tyack, aged about 40, born in the county, copper miner, and wife Susannah Tyack, aged about 35, born in the county, were living in Seveock, Kea. With them were children: Jane (12), Emma (9), John (6), Cecelia (4)
In 1851 John Tyack, aged 49, born in Kea Cornwall, farmer of 30 acres, and wife Suan, aged 47, born in Kenwyn Cornwall, were living in Saveock, Kea. With them were children (born in Kea): John (16), ag lab., Celia A. (14), ag lab., Lavinia (7), scholar, James H. (9), Susan (4).
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John Tyack of Seveock died aged 53 years (burial record).
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The Will of John Tyack late of the parish of Kea in the county of Cornwall, Yeoman, deceased, who died 19 December 1853 at Kea aforesaid, was proved 6 November 1860 at Bodmin by the oath of Susanna Tyack of Kea aforesaid, widow, the relict, the sole executrix. Effects under £450. 3