| First Name (With Contractions) | Mary |
| First Name (Without Contractions) | Mary |
| Surname | Costello |
| Married Surname | Barker |
| Spouse's Occupation (As Documented) | Mariner |
| Spouse's Occupation (Standardised) | Mariner |
| Gender | Female |
| Abode | Crosbie St. |
| Year | 1856 |
| Parish | St Peter, Liverpool, Lancashire |
| Date Of Marriage | 25 Sep 1856 |
| Minor Or Full | minor |
| Status | Spinster |
| Witnesses | Alexander Ross; Julia Harris, (X) |
| Marriage Type | Licence |
| Marrying Minister | W. R. Duncan, Curate |
| Register | Marriages 1856 - 1857, Page 30, Entry 59 |
| Source | LDS Film 1656679 |
| Witnessed By | Alexander Ross |
| Witnessed By | Julia Harris |
| Married To | John Barker |