This is the thread about Caroline's husband, which would be worth reading for anyone who wants to help:
http://genealogistsforum.co.uk/Forum...ead.php?t=7037
FreeREG doesn't give a surname for Caroline on Eliza's baptism in 1818, so I'm confused as to where you got Anon from, Babs?
Or am I misunderstanding and you just mean you got her first name from Eliza's baptism and you don't know her surname?