Hello again, Kate - you get around!!

To reply to something on your original thread, you just have to click on 'reply' , a reply box opens for you to type out your reply and then just click on 'send'. Doesn't matter if you get it wrong at first - just go for it!!

The reference I gave you for that baptism for Female Foster
is the GRO reference - sorry if I didn't make that clear.
As for siblings of Jane - you should be able to find them on either the 1841 or 1851 censuses. I don't have a subscription to Ancestry so can't help you there, but there are plenty of Rootschatters who do - and will, I'm sure, come to your aid.
Jill