Sharon,
Even if Mary Cappock, 28 , on C1841 was sister of Thomas, 29, there are still some unanswered questions...
Where is Emma Coppock on C1841 ?(she was having Thomas's children before C1841)
Where is James Coppock , aged 3, born St Helens Lancashire ?
Where is Thomas Coppock, born 1840, on C1841
What becomes of Hannah Coppock, 3 yrs old, on C1841. Is she dtr of Mary Coppock, a married or single woman ?
Did South Shields-born glassmaker, Thomas Coppock, have connections in Lancashire i.e. St Helens-re glass making ?
Michael