In 1911 Guy Mountain (24) of Covenham, farmer's son assisting on farm, was with his parents in The Grange, Utterby, Lincs.
In 1924 Guy Mountain was a witness at the marriage of his brother Tom to Isabella Smith.
In the 1939 Register Guy Mountain (b. 25 Jul 1886), farmer, and wife Doris W Mountain (b. 18 May 1894), unpaid domestic & poultry work, were living in Mountain's Farm, Louth R.D., Lincolnshire.
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Guy Mountain died aged 78 years.
Guy Mountain of Park View South Reston Lincolnshire died 18 August 1964 at County Hospital Louth Lincolnshire. Probate Lincoln 5 March 1965 to Doris Winifred Mountain, widow, and Mary Elizabeth Mountain, spinster. Effects £32710.