In 1861 William Mayne, aged 19, born in Illogan Cornwall, farmer's son, was with his widowed father in Brea, Illogan.
In 1871 William Mayne, aged 29, born in Illogan, farmer, and wife Hannah Mayne, aged 34, born in Camborne Cornwall, were living in Brea, Illogan. With them were children (born in Illogan) Eliza R. (4), scholar, Joseph (2), and sister-in-law Susan Thomas (39) of Illogan, domestic.
In 1881 Willm Mayne, aged 39, born in Illogan, farmer cottager, and wife Anna Mayne, aged 45, born in Camborne, were in Brea, Illogan. Present were daughter Cath T (16) of Illogan, governess, mother-in-law Cath Thomas (80) of Camborne, widow, annuitant, and visitor Susan Thomas (49) of Illogan, unmarried.
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NEWS has been received at Brea, Camborne, of the death of Mr. William Mayne, who was reared at Brea and farmed some land there, about 14 years ago. Deceased left for Mexico about a year afterward, where he died, probably about a month since. He leaves several grown-up children who, like their father, were always much esteemed.
Cornishman, Thursday, 28 Oct 1897, p. 5
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Miss Thomas, Basset-street, has received a cablegram announcing the death in Mexico from heart disease, of William Mayne. Deceased was a native of Brea, and was 56 years of age. His wife and family joined him in Mexico in March.
Cornubian and Redruth Times, Friday, 29 Oct 1897, p. 7
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William Mayne of Pachuca Mexico, mining engineer, died 16 October 1897. Administration London 11 May 1898 to Catherine Thomas Wallis (wife of James Wallis). Effects £233 11s. 5d. 4