Ann Evans worked as a midwife and nurse in the Whanganui and South Taranaki regions, reaching her patients by horseback and foot, crossing flooded rivers, slogging through dense bush and enduring harsh weather.
Young Ann, nee Clive, was a born nurse. She was in the first party of nurses who served with Florence Nightingale, nursing the wounded and ill during the Crimean War of 1854-1856. While most nurses who served in Crimea remained unknown, Nightingale was immortalised as "The Lady of the Lamp", and was to become the face of nursing.
In an interview with the Wanganui Chronicle in March 1913, Ann Evans expressed great respect for Nightingale. She is quoted as saying, "Words could not express the generosity, goodness and beauty of that woman's actions".
Evans migrated to New Zealand in 1863 and the same year married Thomas Evans, a painter, in Dunedin. The couple moved to Napier and then to Whanganui. They had five children: Katie, Sarah, William, Charles and Mary.
Thomas died in 1871, leaving Ann with no immediate means of support for herself and her children, the youngest of whom was only 2 months old. She moved her family to the main Armed Constabulary camp at Waihi in Taranaki, where her skills as a nurse and midwife were quickly recognised. She became known as "Ann the Doctor", or "Dr Ann". In the 1870s the family lived in Hāwera where, later in the decade, she opened a boarding house.