"Joanna and William had two children, the youngest being Ann Phoebe Hunt (b.1843). Stephen Baldwin seems to have been close to his young half-sister, even after she married and emigrated to America. She was living with Stephen and family in Dulwich in 1861 (noted as step-sister) and gave her address as Upper Norwood when she married Alfred Smith Campbell (1839-1912) at Greenwich in 1863. The Campbells had two children in England before emigrating to the USA in 1866. They lived in New Jersey and had several more children including Charlotte Campbell (b1875) and Isabel (or Isabella) Campbell (b1880) (In later life, Stephen would take an annual holiday at their home.)"
Annie appears to be living with her daughter Florence in later years (see 1915 New Jersey Census).
"England Births and Christenings, 1538-1975," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NJQQ-19G : 11 February 2018, Ann Phoebe Hunt, ); citing item 6 p 53, index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 1,866,558.
"New Jersey State Census, 1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV9W-HVV2 : 15 March 2018), Annie P Campbell, Elizabeth, 12 ward, 3 district, Union, New Jersey, United States; citing sheet #14B, household 310, line #90, New Jersey State Library, Trenton; FHL microfilm 1,465,561.