In the 1841 census, I have found a "Maria Pavell" who was the daughter of Fletcher Pavell (this should be "Pavett"), b 1795. She was supposed to "58" years of age but to fit in I think it should read "10". In the 1841 census for Cromer Street, Grays Inn Lane off the City Road, she was living with her parents and sisters and two brothers, Charles b 1825 and Joseph b 1827. She was not with the family in subsequent censuses, so this could be the right Maria, who was emigrating to be with her brothers, maybe. I do not know where "Bramfield" came in, as in later censuses the family were generally born in St Pancras. NB the family seems to have been called "Pavett". I hope this can help.