Short answers, pulled from the story.
Richard Arkwright opened the world's first steam-driven textile mill on Miller Street in Manchester in 1781. This single building marked a turning point from water power to steam power for early cotton mills.
The term Cottonopolis came into use in about 1870. By that time, three-quarters of the textiles manufactured were exported by foreign companies based in the Port of Manchester during the previous decade.
The number of cotton mills in Manchester peaked at 108 in 1853. As these numbers declined, cotton mills opened in surrounding towns like Bury, Oldham, Rochdale, Bolton, Blackburn, Darwen, Rawtenstall, Todmorden and Burnley.
The third exchange designed by Mills and Murgatroyd opened in 1874. It featured Classical style Corinthian columns and a dome with a vast hall standing 29.2 metres high.
Cotton trading ceased there in 1968 after World War II damage. The building damaged in 1996 by IRA bomb rebuilt at cost of £32 million.