David Livingstone (19 March 1813 – 1 May 1873) was a Scottish Congregationalist pioneer medical missionary with the London Missionary Society and an explorer in Africa. His meeting with H. M. Stanley on 10 November 1871 gave rise to the popular quotation "Dr. Livingstone, I presume?" Perhaps one of the most popular national heroes of the late 19th century in Victorian Britain, Livingstone had a mythic status, which operated on a number of interconnected levels: Protestant missionary martyr, working-class "rags to riches" inspirational story, scientific investigator and explorer, imperial reformer, anti-slavery crusader, and advocate of commercial empire.