Hello Chris,
Hoping you can help with the marriage of 3xGt grandparents James Sefton  b: Staffordshire about 1787 and Lydia (sorry no maiden name) b: Chapel-en-le-Frith about same year.
Shown on 1841 census as living in Stockport with 2 daughters, Mary aged 15 and Emily, 19 with son-in-law James Goodwin.  Know there was a brother born about 1816, all in Cheshire, so am thinking marriage may have also been in Cheshire.  Hope you can help.  
Thanks in advance,
Obadiah