Born 14 February 1897, the ninth child and third son of George Fitzsimons, a farmer, and his wife, *née* Haining. He was educated at Dumfries Academy, Scotland, and Waitaki Boys High School in New Zealand. He received his medical training at Otago Medical School, Dunedin, and later at Guy's Hospital, and took the Fellowship in 1927. Fitzsimons practised for the rest of his life in Auckland, New Zealand. He married in 1926 Miss Ringland, daughter of T H Ringland, of Napier, New Zealand, and died at 83 Remuera Road, Auckland, on 10 December 1949, aged 52. His wife survived him, with a son and two daughters.