Florence Nightingale, British nurse and hospital reformer, c1836 (1956).

Florence Nightingale, British nurse and hospital reformer, c1836 (1956). Seated beside her sister, Frances Parthenope, Lady Verney. Florence Nightingale (1820-1910) made her reputation by her organisation of nursing service during the Crimean War. Thereafter she worked tirelessly to improve public health nursing at St Thomas's Hospital in London. From the National Portrait Gallery, London. A print from 'People, a volume about the origin and early history of many things, common and less common, essential and inessential', by Readers Union The Grosvenor Press, London, 1956. (Photo by The Print Collector/Print Collector/Getty Images)