the roof. Between 1801 and 1803, Long Mill was built, it was eight storeys high, 30 bays long by 4 bays deep, its 45 hp Boulton and Watt engine was placed in an internal engine house on the south side of the mill but the boilers were external. A tunnel and a bridge connected it to Old Mill. The Green Dragon public house on the corner of the plot, was left in situ. In 1809, a gas making plant was built on the site, and Long Mill became one of the first gas-lit mills. There were six gasometers and 1500 burners were fed by a 19mm pipe. Colonel Sedgewick sold adjacent land to McConnel & Kennedy in 1817 and the four blocks of Sedgewick Mill were erected between 1818 and 1820. The largest, facing Redhill Street (Union Street), was eight storeys high and 17 bays long. The blocks were of fireproof construction. The mill's main drive shaft ran in a tunnel under the ground floor from the internal engine house which contained a 54 hp Boulton and Watt beam engine with a flywheel. William Fairbairn and James Lillie, designed and installed the shafting, which was unusual as the wings of the mill were offset at 15 degrees to the right angle. The main drive shaft powered a vertical shaft in each bay that ran to each floor. The company was the largest employer in Manchester at the time. John Kennedy retired in 1826, and the firm traded as McConnel & McConnel Co. Alexis de Tocqueville, described Redhill Street Mill in 1835 as "... a place where some 1500 workers, labouring 69 hours a week, with an average wage of 11 shillings, and where three-quarters of the workers are women and children". During the Cotton Famine, the company obtained rights to Heilmann's combing machine. As the century progressed, bigger and bigger machinery was used. The Fairbairn Engineering Company were employed to modify the structure of the mills in the mid-1860s. This involved replacing the old cast iron columns with new ones, each floor used a different technique. Sedgewick New Mill, was an unusually narrow five-storey L shaped mill by A. H. Stott, designed for doubling sewing thread. It was Stott's second commission and neither party was satisfied with the result. McConnel became part of the Fine Spinners' and Doublers' Association Limited in 1898. Paragon Mill and New Old Mill were built