sentences:  As a result, Parnell and other leaders, including John Dillon and William O'Brien, were imprisoned in Kilmainham Gaol on 13 October 1881.Chamberlain supported their imprisonment rather than further concessions, and used their incarceration to bargain with them in 1882.In the ensuing 'Kilmainham Treaty', the government agreed to release Parnell in return for his co-operation in making the Land Act work.