In 1891 William D. K. Harris (17) of Phillack, pattern maker's apprentice, was with his parents in Copperhouse Foundry Estate, Phillack.
In 1901 William Harris (27) of Phillack, pattern maker, was with his parents in Ventonleague, Phillack.
In 1911 William D K Harris (37) of Hayle, foreman pattern maker, and wife of 7 years Laura J V Harris (34) of Hayle (mother of 4 children, 1 deceased) were living at 1 Foundry Road Camborne. With them were children: William Thomas (6) of Hayle, Henry Donnithorne (3) of Camborne, Phillis Jane (3 mo) of Camborne.
In May 1915 William Donnithorne King Harris, pattern maker, was granted Administration of his father's personal effects.
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William Donnithorne King Harris of 3 Foundry-road Camborne Cornwall died 27 July 1926 at West London Hospital Hammersmith London. Administration Bodmin 1 October to Laura Jane Veal Harris, widow. Effects £701 3s. 11d. 3