Thank you for the offer.
Could you look for :-
CHIPPENDALE or CHIPPINDALE, Isaac and James in Leeds (after 1850).
DEDROSS or DEADROSS, in London. I don't expect any, as the only money my family had was what it stole from others!
GALLAWAY, James & Frances. Westminster 1801-50?
STARLING, Ezekiel. London.
Best wishes,
Nigel