Describe about the letters that were sent by Captain Swing to the farmers.

On 1 June 1830, a farmer in the north-west of England found his barn and haystack reduced to ashes by a fire that started at night. In the months that followed, cases of such fire were reported from numerous districts. At times only the rick was burnt, at other times the entire farmhouse. Then on the night of 28 August 1830, a threshing machine of a farmer was destroyed by labourers in East Kent in England. In the subsequent two years, riots spread over southern England and about 387 threshing machines were broken. Through this period, farmers received threatening letters urging them to stop using machines that deprived workmen of their livelihood. Most of these letters were signed in the name of Captain Swing. Alarmed landlords feared attacks by armed bands at night, and many destroyed their own machines. Government action was severe. Those suspected of rioting were rounded up. 1, 976 prisoners were tried, nine men were hanged, 505 transported – over 450 of them to Australia – and 644 put behind bars.