 
| Type | Valeur | 
|---|---|
| Titre | Soph Blackwell in household of James Blackwell, "England and Wales Census, 1871" | 
| Personnes | 
|---|
|  Sophia Blackwell | 
| "England and Wales Census, 1871", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRFT-PHY : 20 January 2022), Soph Blackwell in entry for James Blackwell, 1871. |