In 1871 I can see a Sarah Peart (aged 1) in Bengrove, Gloucestershire, with a father Charles Peart. However, I can't see this family in the 1881 census. Father Charles was already 44 in 1871, and had possibly died by 1881, but perhaps one of Sarah's brothers was in the army in India? Or her brother in law? (her sister Jane is married in 1871, I think to Thomas Drinkwater although he is not in the household)