- [S104] 1871 Census Returns of England and Wales, General Register Office, (2 April 1871;), RG 10/1592 f.138 p.19 (Reliability: 3).
John Belsham, Head, Mar, 38 [or 36], Thatcher, Cambs Castle Camps
Mary Belsham, Wife, Mar, Dressmaker, Cambs Castle Camps
Frederick Belsham, Son, 7, Scholar, Cambs Castle Camps
Eliza Belsham, Daur, 3, Scholar, Cambs Castle Camps
Benjamin Belsham, Son, 8m, Cambs Castle Camps
- [S42] Births, Marriages and Deaths - Cambridgeshire Index Project, Cambridgeshire County Council, (http://www.cambridgeshire.gov.uk/sub/register/cambsindex.htm;), marriage of John Belsham and Mary Calton, 1863 (Reliability: 2).