Margaret O’ Callaghan MA (NUI) PhD (Cantab.) is an historian and political analyst at the School of Politics, International Studies and Philosophy at Queen’s University, Belfast. A former Laski Research Scholar at St John’s College Cambridge and Fellow of Sidney Sussex, College, she has taught at the Universities of Cambridge and Notre Dame. She is the author of numerous works on aspects of British high politics and the state apparatus in Ireland from the late nineteenth century to the revolution, on the Royal Irish Constabulary, on partition , the Boundary Commission of 1925, the fringe-fenian press, the careers of Richard Pigott, Roger Casement, and Tom Kettle, on Belfast in the 1960’s and 70’s and on Ian Paisley and the Royal Ulster Constabulary. She co-edited with Mary E .Daly 1916 in 1966; Commemorating the Easter Rising (Royal Irish Academy, 2007).