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In page Marie Stopes:

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On the printed notepaper is a list of prominent supporters which include the militant suffragette Lady Constance Lytton, feminist novelist Vera Brittain, Emily Pethick-Lawrence (former Treasurer of the Women's Social and Political Union), Rev Maude Royden (Women's Suffrage Societies).[citation needed] Later supporters included eminent economist John Maynard Keynes.[citation needed] Three months later she and Roe opened the Mothers' Clinic at 61 Marlborough Road, Holloway, North London, on 17 March 1921.[7] The clinic was run by midwives and supported by visiting doctors.[8] It offered mothers birth control advice, taught them birth control methods and dispensed Stopes own "Pro-Race"[9] (and "Racial")[10] cervical caps.