Grave of Mary Ann Parkman, St Mary de Haura, Shoreham-by-Sea. The inscription reads: In affectionate remembrance of Mary Ann, the beloved wife of George James Parkman, who died Octr. 20th. 1875 aged 40 years.
Census records for 1871 show Mary Ann living at Ireland's Court, Monmouth Street, Topsham, Devonshire with her husband George and their two children, daughter Marian and son Thomas. I can't find George on the 1881 census. On the 1891 census, George is described as an accountant and is living at 2 Selborne Place, Lorna Road, Hove, with his second wife Emma and two more children, son George and daughter Emma Louise.
You can see more gravestones and memorials over at this week's Taphophile Tragics.