Vanishing lady

[Quarryman]

Trying to trace my great aunt - Margaret Roberts, of Mynydd Llandygai, Gwynedd. She appears in the 1851 census, aged 12 living with her family at Gefnan, but then disappears.
If anyone has access to the 1861 census is it possible to spare the time to see if she is a 'servant' (many girls of large families became 'servants', or rather helped out in households where there was only one parent, in their teens) somewhere in Llandygai?

I cannot find any marriage or death post 1851.

[janetm]

1861 Census Beaumaris  Anglesey 
RG9/4346  Folio:    52  Page:    9


Thomas Richard Dew
abt 1822    Llangefni, Anglesey, Wales   Head
Maria Louisa Dew
abt 1831    Birmingham, Warwickshire, England   Wife
Elizabeth Ann Dew
abt 1849    Llandysilio, Anglesey, Wales   Daughter
Jane Dew
abt 1854    Llandysilio, Anglesey, Wales   Daughter
Louisa Ann Dew
abt 1850    Beaumaris   Daughter
Maria Louisa Dew
abt 1859    Beaumaris   Daughter
Thos Richard Dew
abt 1857    Beaumaris   Son
Ann Jones
abt 1843    Beaumaris, Anglesey, Wales   Servant
Elizabeth Roberts
abt 1836    Bestinrog, Merionethshire, Wales   Servant
Margaret Roberts
abt 1838    Llandegai, Caernarvonshire, Wales   Servant