She moved from Amersham (1922) to Chesham Bois in 1929, but from 1930 a large proportion of her exhibits were of Cornish scenes. In 1936, she lived at Blomfield Road in London, a few doors away from Dorothea SHARP and Marcella SMITH, and continued to visit Cornwall regularly. She may have joined Sharp and Smith in St Ives in 1939 at the outbreak of the Second World War, but returned to London.

Edith Mitchell exhibited at the Goupil Gallery, the Walker Art Gallery in Liverpool, the London Salon, the Royal Academy, Royal Society of British Artists and Royal Institute of Painters in Water Colours.

She died at the Manor Nursing Home, Lelant, near St Ives.