Looking at the 1851 census - with Harriot and her brother Thomas + Edward Aston (visiting), born Newland, and Mary Aston - born West Dean.

Next door to them is their brother

William COOPER - age 34, Charcoal Carrier
Mary Ann - age 25 - born Bicknor
Mary Jane - age 3 - born West Dean
Sarah Ann - Age 1 - born West Dean

Sophia BUCK, Nursemaid - age 10 - born Bicknor
Richard Burgan? - Servant - age 12 - born Bicknor
Jane BUCK, Visitor,unmarried- age 17 tinplate cleaner, born Little Marston