Ann Mayo
born April 1830–April 1831
  in Birmingham, Warwickshire
died very roughly 1900

Seems odd that she does not appear in the same household as her siblings in the 1841 census, and that the LDS have records for her adjacent siblings, but not for her.

1851 census: living with father and sisters on Howard [or Steward?] Place in the St Jude's district of Birmingham. She is 20, and born in Birmingham.