Captain Rock
Captain Rock was a mythical Irish folk hero, and the name used for the agrarian rebel group he represented in the south-west of Ireland from 1821 to 1824.
Arising following the harvest failures in 1816 and 1821, the drought in 1818 and the fever epidemic of 1816-19. Rockites, similar to the earlier Whiteboys, targeted landlords who were members of the Protestant Ascendancy. Captain Rock (or Rockites) were responsible for up to a thousand incidents of beatings, murder, arson and mutilation in the short time they were active.
With the return of "a bearable level of subsistence", the low-level insurrection for a period subsided, but was to flare repeatedly through, and beyond, the Great Irish Famine of the 1840s. Over this period and in subsequent years, well into the nineteenth century, threatening letters signed by "Captain Rock" (as well as other symbolic nicknames, such as "Captain Steel" or "Major Ribbon") issued warnings of violent reprisals against landlords and their agents who tried to arbitrarily put up rents, collectors of tithes for the Anglican Church of Ireland, government magistrates who tried to evict tenants, and informers who fingered out Rockites to the authorities. Such letters would borrow the language of official or legal documents and failure to obey would be met with destruction of property or livestock or physical violence against the addressee.