Arnott was educated at
London University's School of Medicine for Women, but, as this institution was not permitted to award degrees to women, in 1893 she sat her exams through the
Royal University of Ireland. In 1896, she returned to British India. She was firstly employed at Mure Memorial Hospital, then became the medical officer at the
Lady Dufferin Hospital,
Karachi. Between 1901 and 1904 she was in charge of the Jaswant Hospital for Women,
Jodhpur. and as a doctor in
Coventry. She then settled in West Yorkshire to run the
Eastby Sanatorium in
Bradford as its Chief Medical Officer, staying to run it for many years. She became known as an expert in treating
tuberculosis. == Activism ==