Hi Ruth
Thats a good lead, I haven't seen the 1851 census.
I made a mistake, I just checked - the Martha Steden name comes from the birth cert of their child - 'Lavinia Shrimpton Lovell' (not the marriage cert, which I have not found yet). So no info yet on fathers name. Martha was born in 1838 - ~13 yrs in 1851 census.
Steve