At the end of the 20th century, the city had little more than thirty per cent of the population it had in 1915 (when the population reached more than 43,000), and about 5,000 less than the 1855 population of 18,259. In proposing reforms and his advocacy for town planning legislation, Charles Reade illustrated the Adelaide slums associated with the city's high population levels with lantern-slides accompanying his lecture "Garden cities v. Adelaide slums and suburbs" in the Adelaide Town Hall on 8 Oct 1914.