The BBC broadcast a programme on Radio 4 on Sunday 11 March 2013, presented by the distinguished historian Professor Lisa Jardine, about the outstanding achievements of Mary Cartwright, the first female President of the LMS. You can listen to the programme here and an article based on the programme is available on the BBC website
The programme cites Cartwright's paper on Non-Linear Differential Equations of the Second Order, which was published in The Journal of the London Mathematical Society. The paper is available here for the next three months.