This is one of my favorite Civil War era photos! The dress is amazing – layers of ruffles and topped with a lace jacket. Perhaps this woman was dressed for a ball! The hairstyle is still very conservative. I would date this about 1867.
John Bull was the photographer. He lived and had his studio at City Road in Peterborough, a city in northwest Cambridgeshire, England. John, his wife Louisa Mary, and son John, Jr., were residents there from the 1861 census to 1891. John was born about 1837, his wife about 1833, their son about 1862.