In 1885, in the wake of Josephine Butler's fight for the repeal of the Contagious Diseases Acts, Stead entered upon a crusade against child prostitution by publishing a series of four articles entitled "The Maiden Tribute of Modern Babylon". In order to demonstrate the truth of his revelations, he arranged the "purchase" of Eliza Armstrong, the 13-year-old daughter of a chimney sweep. His first instalment was trailed with a warning guaranteed to make the "Pall Mall Gazette" sell out. Copies changed hands for 20 times their original value and the office was besieged by 10,000 members of the public. The popularity of the articles was so great that the Gazette's supply of paper ran out and had to be replenished with supplies from the rival "Globe".