Hi,
I've searched the OMI for an entry for Elizabeth Jackson & Thomas Mascord but haven't found a match. I also searched under Elizabeth Bonham, but again no match. There is only one Thomas Mascord entry and that is to a Susannah Adams in Banbury in 1809.
There are only 11 Mascord entries (for males only) in total, all of which are in Banbury between 1718 and 1827.
If you want me to do any other searches let me know.
Regards
Paula