from FreeBMD
http://www.freebmd.org.uk/cgi/search.plSurname..First name(s)..District..Vol..Page
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Marriages Jun 1897
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Haines..Ada Martha......Newbury...2c..531
Scrace..Gaius William...Newbury...2c..531
Births Mar 1874
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Haines..Ada Martha......Newbury...2c..238
I have also found her in the IGI online 1881 census with possibly her brother, sadly:
Name Relation Marital Status Gender Age Birthplace Occupation
Ada Martha HAINES Pauper Female 7 Thatcham, Berkshire, England Scholar
Edward HAINES Pauper Male 15 Thatcham, Berkshire, England Scholar
Institution 1 "Newbury Union Workhouse" Newtown Road
Census Place Newbury, Berkshire, England
Family History Library Film 1341309
Public Records Office Reference RG11
Piece / Folio 1270 / 102
Page Number 9
Birth certificates would confirm this and give you her parents' names. If Edward is her brother (there are a few possibles in FreeBMD - Edward Francis b1868 looks likely), you should be able to find him and family in 1871 census etc
HTH
Chris (no relationship known at present)