At the outbreak of war in 1914, Lucas was invited back to the
London School of Medicine for Women to work as a Lecturer in Embryology and Senior Demonstrator in Anatomy, During two summer vacations Lucas travelled with the Dean of the school and surgeon,
Louisa Aldrich-Blake, to volunteer at
Royaumont Abbey in northern France, where the
Scottish Women's Hospitals for Foreign Service ran a large hospital for casualties. In 1924 she was appointed Professor of Anatomy and it was widely reported at the time that she was the first female professor of anatomy in the UK and USA. She was elected president of the
Medical Women's Federation and held the role from 1946 to 1948. She was also the first woman president of the
Anatomical Society of Great Britain and Ireland. She was appointed Emeritus Professor of the
University of London in 1951. She was also admitted to the
Worshipful Society Apothecaries of London and to the
Freedom of the City of London by Redemption. == Death and legacy ==