A phenomenal mathematician, Hanna Neumann achieved her success in the face of the Nazis, an imprisoned husband, and entrenched misogyny. She arrived in Australia in 1963 to take academic positions at the Australian National University, and was made chair of pure mathematics in 1964, making her the first female Professor of Mathematics in Australia. Her most widely known work 'Varieties of Groups' was published in 1967. Dr Peter Neumann OBE describes the life of his mother, Hanna Neumann, and her long and distinguished career as a female mathematician in the early part of the 20th century.