A History of Ireland Under the Union, 1801 to 1922. With an Epilogue Carrying the Story Down to the Acceptance in 1927 by De Valera of the Anglo-Irish Treaty of 1921. London. Methuen & Co, 1952. Pp xii, 811. Large 8vo. Blue cloth, title in gilt to spine. A fine copy, without d.j. O'Hegarty's best-known study was the culmination of a life spent thinking about and making Irish history. In his dedicatory preface, O’Hegarty writes 'No people that does not know its past can build wisely. I have tried to set down in this book what happened in the political history of that last phase of Ireland’s captivity when she was attacking, suffering only momentary setbacks, and recovering her national liberties one by one.'