The Soho area has been at the heart of London's sex industry for more than 200 years; between 1778 and 1801, 21 Soho Square was location of the White House, a brothel described by the magistrate Henry Mayhew as "a notorious place of ill-fame". Shortly before World War I, two rival gangs, one led by Chan Nan (also called "Brilliant Chang") and the other by Eddie Manning, controlled drugs and prostitution in Soho. Both were eventually arrested and imprisoned; Manning died midway through a three-year sentence in 1933. Following World War II, gangs set up rings of prostitutes in the area, concentrated around Brewer Street and Rupert Street. Photographers also visited Soho in the hope of being able to blackmail people caught in the act of visiting prostitutes.