Industrial development brought both prosperity and poverty to the community. Coal mining occurred in Johnstone, although its main industry was related to the thread and cotton industries, with mills powered by the Black Cart Water which runs to the north of Johnstone. A six-storey cotton mill, one of the largest in Scotland, was built in 1782, and was rescued from failure by Robert Burns of Paisley sometime before 1812. Burns introduced Richard Arkwright’s methods for spinning cotton. As the community expanded, slum conditions formed in part of the town: the population by 1831 had increased to a sizeable 5,600. Unfortunately, the owners of Johnstone mill did not make much philanthropic progress among their worker population, and the situation was not addressed until the 1930s by a significant expansion of the size of Johnstone to include a number of purpose-built residential estates.