The Parnell Commission was a judicial inquiry in the late 1880s into allegations of crimes by Irish parliamentarian Charles Stewart Parnell which resulted in his vindication.
On 6 May 1882 two leading members of the British Government in Ireland, Chief Secretary for Ireland Lord Frederick Cavendish and the Permanent Under-Secretary for Ireland T.H. Burke were stabbed to death in Phoenix Park, Dublin by the Irish National Invincibles (see Phoenix Park Murders).
In March 1887, The Times published a series of articles, "Parnellism and Crime", in which Home Rule League leaders were accused of being involved in murder and outrage during the land war. The Times produced a number of facsimile letters, allegedly bearing Parnell's signature and in one of the letters Parnell had excused and condoned the murder of T.H. Burke in the Phoenix Park.
In particular the newspaper had paid £1,780 for a letter supposedly written by Parnell to Patrick Egan, a Fenian activist, that included: "Though I regret the accident of Lord F Cavendish's death I cannot refuse to admit that Burke got no more than his deserts" and was signed "Yours very truly, Charles S. Parnell". On the day it was published (18 April 1887), Parnell described the letter in the House of Commons as "a villainous and barefaced forgery."
Also on 18 April the Perpetual Crimes Act had its second reading and debate in the Commons. It appeared to nationalists that it was more than coincidental that the Times article on the letter was published on the same day, and was obviously intended to sway the debate.
After considerable argument, the government eventually set up a Special Commission to investigate the charges made against Parnell and the Home Rule party. The commission sat for 128 days between September 1888 and November 1889. In February 1889, one of the witnesses, Richard Piggott, admitted to having forged the letters; he then fled to Madrid, where he shot himself. Parnell's name was fully cleared and The Times paid a large sum of money by way of compensation after Parnell brought a libel action. His principal lawyer was Charles Russell, who later become Lord Chief Justice. Russell also wrote an influential book about the case.