William Cowper (b. 1809/10 d. 1864 or later)
Farmer and grazier. Of Wappenham, Northamptonshire. May have died in Canada in 1883.
Census returns of England and Wales 1861 (The National Archives: Public Record Office RG9/924/158/1)
Northamptonshire, England, Church of England baptisms, marriages and burials, 1532–1812 (Ancestry.com, accessed 13 August 2018)
Ontario, Canada, deaths and deaths overseas, 1869–1946 (Ancestry.co.uk, accessed 13 August 2018)
Post Office directory of Northamptonshire 1854, 1864.
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