Query: How many water-powered cotton mills used child labour in 1788 England and Scotland?
Context: In 19th-century Great Britain, one-third of poor families were without a breadwinner, as a result of death or abandonment, obliging many children to work from a young age. In England and Scotland in 1788, two-thirds of the workers in 143 water-powered cotton mills were described as children. A high number of children also worked as prostitutes.