The only two I can find in Lincolnshire old enough to marry in 1829. The first one is the one in my tree. I have no idea where that middle name Johnson comes from.
Sarah Bufham
England Births and Christenings, 1538-1975
christening: 01 Jul 1806 GEDNEY,LINCOLN,ENGLAND
residence: Lincoln, England
parents: James Bufham, Mary
Sally Buffam
England Births and Christenings, 1538-1975
christening: 22 Mar 1797 Sibsey, Lincoln, England
residence: Sibsey, Lincoln, England
parents: Richard Buffam, Ann Buffam