Hi Bill
No I don't have those names in my family
"Or have you just been a particularly kind person helping me along? " yes, that's me !!!, can't help myself if I see something that comes up.
Check deaths as there are 2 around the time Mary was born in Chelsea and another about 1851 in Marylebone before Andrew's second marriage, from memory but I am sure it would help you, if they sailed without little Mary the chances are the poor child had died
1841 showing piece no 680 Paddington missing as is 690 Paddington Kensington, Brompton and Kensal Green, frustrating as I have whole families there but I have caught up with them on later census
Happy hunting
LM