The cotton trade of Lancashire was now fairly established; steam was just beginning to be commonly used as the motive power instead of the old water-wheel, and consequently the sites suitable for factories were no longer limited, and this at once led to a further very great development of textile manufactures. This rapid growth was not unattended with intermittent periods of depression, which the working men of the day were not always prepared to attribute to the right cause, and thus riots and disturbances were of frequent occurrence in the manufacturing districts. One of the most serious of these terminated in what has ever since been known as "the Peterloo." In 1816 the staple trades of Lancashire were in a very depressed state, and this led to the formation of political union societies, one of the chief objects of which was to obtain annual parliaments and universal suffrage. These societies met in St. Peter's Fields, Manchester, in October, 1816, when all passed off quietly and orderly, but on March 10 following a larger meeting was held at the same place, at which about 1,000 men appeared with blankets over their shoulders, and with the avowed intention of marching to London to lay their grievances before the Prince Regent. This meeting was dispersed by the military, and several of the _Blanketeers_ (as they were called) were taken to prison. The popular feeling was, however, not appeased, and the turn-out for an advance of wages of the spinners, weavers and colliers, towards the end of 1818, added fuel to the fire. Led on by Henry Hunt of London and others, it was decided to hold a mass meeting in St. Peter's Fields on January 18, 1819, which meeting was held, and a resolution passed calling for the immediate repeal of the Corn Law. In the August following, the borough reeve and constables of Manchester refused to call a public meeting to consider the best means of obtaining a reform of the House of Commons, although 700 householders had signed the requisition. The result was that the requisitors themselves summoned the meeting, which was held near St. Peter's Church on August 16, Henry Hunt being called upon to preside. This meeting was attended by members of the societies from Oldham, Rochdale, Middleton, Ashton, Stockport, and all the surrounding villages, each contingent being accompanied by its band of music. The magistrates, being determined to disperse the vast assembly, called to their aid 200 special constables, the Manchester and Cheshire Yeomanry Cavalry, the 15th Hussars, and a detachment of the 88th Regiment of Foot, some pieces of artillery also being ready if required.