Flag of the City of London about the 13th century. His full figure representation was rapidly replaced with his symbolic representation of the sword. Some believe the sword is a dagger that commemorates the dagger of Sir William Walworth, former Lord Mayor of London, which killed Wat Tyler, leader of the Peasants' Revolt, in 1381. A verse at Fishmongers' Hall may explain the relationship: "Brave Walworth, Knight, lord mayor that slew Rebellious Tyler in his alarmes; The king therefore did give him in lieu The dagger to the city armes. However this is believed to be a fable, with the sword on the arms being used
William Cotton (Lord Mayor) Sheriff of London and Middlesex from 1868 to 1869, and Lord Mayor of London from 1875 to 1876, during which years he opened the new poultry and provisions market at Smithfield and presided over a grand banquet welcoming the Prince of Wales on his return from a tour of India. In 1868 he had stood for parliament unsuccessfully at Southwark. At the 1874 general election he was elected Member of Parliament for City of London. He lost his seat in parliament in the 1885 UK general election after representation was reduced from four to two under the Redistribution of Seats