Nellie Joshua was a painter of genre pictures often featuring figures and interiors. The 1911 census shows she was born in Hampstead, London the daughter of an affluent Adelaide, Australia-born stockbroker. Her sister Joan Joshua was also an artist. She attended Heatherley's School of Fine Art in the 1890's. She exhibited at the Royal Academy, Royal Institute of Oil Painters and Society of Women Artists between 1902-11. Her work today is largely known for her fairy-tale prints such as 'Dragonfly'. Nellie Joshua lived and worked in London.
She married Bernard Henry Daniel Horkheimer (1878-1932) in 1913 and when he changed his name by deed poll in 1919 she too became Mrs. Nellie Hawke.