Contents: early organizations; United Irishmen; Ribbon men and others; external influences; development of the I.R.B. and the Fenians; Clan-Na-Gael and the Land League; incubation period; Ancient Order of Hibernians and the revival of the I.R.B.; Germany and the rebels; Sinn Fein; I.R.B. and the I.R.A.; progress of the campaign; attitude of the American societies; British and Irish Secret Service, Sinn Fein Sovietism; psychology of Irish crime.