Unless a birth certificate is obtained there is no clear proof that the parents are as given. The year and quarter do however match the given birth date.
Birth place originally given as Landport which is in the centre of Portsea Island.
Sources
"England and Wales Birth Registration Index, 1837-2008," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2N7Q-KJB : 1 October 2014), Sarah Elizabeth Stuart, 1851; from "England & Wales Births, 1837-2006," database, findmypast (http://www.findmypast.com : 2012); citing Birth Registration, Portsea Island, Hampshire, England, citing General Register Office, Southport, England.
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