 A Royal Commission was set up to enquire into the causes of the Rising.It began hearings on 18 May under the chairmanship of Lord Hardinge of Penshurst.The Commission heard evidence from Sir Matthew Nathan, Augustine Birrell, Lord Wimborne, Sir Neville Chamberlain (Inspector-General of the Royal Irish Constabulary), General Lovick Friend, Major Ivor Price of Military Intelligence and others.