| 'Merry in God' (Father William Doyle, S. J.) | Anonymous | Monograph or Collective Volume | Longmans | 1939 |
| A history of railways in Ireland | Conroy, John Charles, 1906- | Monograph or Collective Volume | Longmans, Green | 1928 |
| A rebel at heart : the autobiography of a non-conforming churchman | Rogers, Guy | Monograph or Collective Volume | Longmans | 1956 |
| Britain and Ireland | Mansergh, Nicholas, 1910-1991 | Monograph or Collective Volume | NA | 1946 |
| Catalogue of the Irish manuscripts in the library of Trinity College, Dublin | Abbott, T. K.Gwynn, E.J. (Edward John) | Monograph or Collective Volume | Hodges Figgis; Longmans Green | 1921 |
| Disturbed Dublin, the story of the great strike of 1913-14, with a description of the industries of the Irish capital | Wright, Arnold | Monograph or Collective Volume | Longmans | 1914 |
| Edmund Campion | Waugh, Evelyn | Monograph or Collective Volume | Longmans | 1961 |
| Father John Sullivan, S. J. | MacGrath, Fergal | Monograph or Collective Volume | Longmans | 1952 |
| Gladstone and the Irish nation | Hammond, J. L. le B. | Monograph or Collective Volume | Longmans | 1938 |
| Henry Ireton | Ramsey, R. W. | Monograph or Collective Volume | Longmans | 1949 |
| Ireland under the Stuarts and during the Interregnum, [vol.] 1 : 1603-1642; [vol.] 2 : 1642-1660; [vol.] 3 : 1660-1690. 3 vols. | Bagwell, Richard | Monograph or Collective Volume | Longmans | 1909 (vol. I & II)
1916 (vol. III) |
| Ireland under the Tudors : with a succinct account of the earlier history. 3 vols. | Bagwell, Richard | Monograph or Collective Volume | Longmans, Green | 1885 (v. I & II)
1890 (v. III) |
| Irish battles | Hayes-McCoy, G. A. (Gerard Anthony) | Monograph or Collective Volume | Longmans | 1969 |
| Landlords and tenants in Ireland. | Dun, Finlay | Monograph or Collective Volume | Longmans | 1881 |
| Life of Lord Redesdale | Mitford, E. B.Weaver, F. J. | Monograph or Collective Volume | Longmans | 1939 |
| Medieval religious houses : Ireland. With an appendix to early sites. Foreword by David Knowles | Gwynn, AubreyHadcock, R. | Monograph or Collective Volume | Longmans | 1970 |
| Mother Butler of Marymount | Burton, Katherine | Monograph or Collective Volume | Longmans | 1944 |
| Mr. Secretary Peel : the life of Sir Robert Peel to 1830 | Gash, Norman | Monograph or Collective Volume | Longmans | 1961 |
| My Irish journal, 1669-70 | Grubb, IsobelPenn, William | Monograph or Collective Volume | Longmans | 1952 |
| Nationality and Home Rule | Balfour, Arthur James, 1st earl Balfour, 1848-1930 | Monograph or Collective Volume | Longmans, Green | 1913 |
| Newman's university : idea and reality | McGrath, J. S. F. | Monograph or Collective Volume | Longmans | 1951 |
| Oliver Goldsmith | Freeman, William | Monograph or Collective Volume | Longmans | 1952 |
| Seán O'Casey | Armstrong, William A. | Monograph or Collective Volume | Longmans | 1967 |
| Story of a year : 1798 | Postgate, Raymond William, 1896-1971 | Monograph or Collective Volume | Longmans | 1969 |
| The Catholic Church and Ireland in the age of rebellion, 1859-73 | Norman, E. R. | Monograph or Collective Volume | Longmans | 1965 |
| The early Christians in Britain | Dood, B. E.Heritage, T. C. | Monograph or Collective Volume | Longmans | 1966 |
| The great O'Neill. A biography of Hugh O'Neill, Earl of Tyrone, 1550-1616 | O'Faolain, Sean | Monograph or Collective Volume | Longmans Green ; Mercier Press | 1942 |
| The Huguenot settlements in Ireland | Lee, G. L. | Monograph or Collective Volume | Longmans | 1936 |
| The Irish struggle and its results | Gill, T. P.Paul-Dubois, Louis | Monograph or Collective Volume | Longmans Green | 1934 |
| The Northern Ireland economy : a comparative study in the economic development of a peripheral region | Harris, RichardJefferson, CliffordSpencer, John | Monograph or Collective Volume | Longmans | 1990 |
| The Reformation in Dublin, 1536-1558 (from original sources) | Ronan, Myles V. (Myles Vincent) | Monograph or Collective Volume | Longmans, Green | 1926 |
| The Reformation in Ireland under Elizabeth, 1558-1580 (from original sources) | Ronan, Myles V. (Myles Vincent) | Monograph or Collective Volume | Longmans, Green | 1930 |
| The revolution in Ireland, 1906-1923 | Phillips, W. Alison (Walter Alison), 1864-1950 | Monograph or Collective Volume | Longmans | 1926 |
| The works of St. Patrick | Bieler, LudwigPatrick, Saint | Monograph or Collective Volume | Longmans Green|Newman Press | 1953 |
| Ulster : a case study in conflict theory | Elliot, R. S. P.Hickie, John | Monograph or Collective Volume | Longmans | 1971 |