| "For the love of God" | Cassells, D. B. | Article in Journal | | 1988 |
| "Grandpa, tell me 'bout the good old days" | Cassells, Brian | Article in Journal | | 2004 |
| "The Inst" at 150: A sequicentenary review | Cassells, Joe | Article in Journal | | 2010 |
| 1916, the Easter Rising | Coogan, Tim Pat | Monograph or Collective Volume | Cassell | 2001 |
| A hotel/boat for the Montiaghs? | Cassells, Brian | Article in Journal | | 2007 |
| Arklow man's voyage of discovery | Cassell, Margo | Article in Journal | | 2010 |
| Blarney Castle Gardens, Co. Cork... the history of the gardens at one of Ireland's most popular tourist destinations | Cassells, Judy | Article in Journal | | 2012 |
| By rail to the golf : NIR and the 2012 Irish open at Portrush | Cassells, J A | Article in Journal | | 2013 |
| Cassell's battlefields of Britain and Ireland | Brooks, Richard, 1949- | Monograph or Collective Volume | Weidenfeld and Nicolson | 2005 |
| Contemporary personalities | Smith, Frederick Edwin, 1st earl of Birkenhead, 1872-1930 | Monograph or Collective Volume | Cassell | 1924 |
| Continental stuccowork and English rococo carving at Russborough | McDonnell, Joseph | Article in Journal | | 2011 |
| Dark days on the Lough | Cassells, Brian | Article in Journal | | 2008 |
| Evacuees in school | Cassells, Brian | Article in Journal | | 2008 |
| Fifty years of Parliament | Asquith, H. H. (Herbert Henry), 1852-1928. | Monograph or Collective Volume | Cassell | 1926 |
| Forty shades of steam : the story of the Railway Preservation Society of Ireland | Cassells, JoeFriel, Charles, P. | Monograph or Collective Volume | Colourpoint Books | 2004 |
| Irish bookbindings, 1600-1800 | Craig, Maurice James | Monograph or Collective Volume | Cassell | 1954 |
| Irish Georgian silver | Bennett, Douglas | Monograph or Collective Volume | Cassell | 1972 |
| Lessons in medical politics : Thomas Wakley and the Irish medical charities, 1827-1839 | Cassell, R. D. | Article in Journal | | 1990 |
| Literature and locality : the literary topography of Britain and Ireland | Freeman, John | Monograph or Collective Volume | Cassell | 1963 |
| Living standards | Cassells, Peter | Article in Book | | 1986 |
| Maud Gonne | Levenson, Samuel | Monograph or Collective Volume | Cassell | 1977 |
| Medical Charities, Medical Politics : The Irish Dispensary System and the Poor Law, 1836-1872 | Cassell, Ronald Drake | Monograph or Collective Volume | Boydell & Brewer | 1997 |
| Medical charities, medical politics : the Irish dispensary system and the poor law, 1836-1872 | Cassell, Ronald Drake | Monograph or Collective Volume | Boydell | 1997 |
| New light on Hugh Montgomerie, Richard Castle and No. 85 St Stephen's Green | Calderón, Loreto,Dechant, Konrad, | Article in Book | | 2010 |
| Newman House. History and Associations | Igoe, Vivien | Article in Journal | | 2022 |
| News from the canal bank | Cassells, Brian | Article in Journal | | 2015 |
| Obligationes pro annatis diocesis Cassellensis, [1433-1534] | | Article in Journal | | 1966 |
| Presbyterianism in Lurgan 1684-1984 | Cassells, D. B. | Article in Journal | | 1983 |
| Saturday, 16 July 1966 | Cassells, Joe | Article in Journal | | 2015 |
| St John's Cathedral, Sligo | Doyle, Bernie | Article in Journal | | 2018 |
| The big house in Ireland | Pakenham, Valerie | Monograph or Collective Volume | Cassell | 2000 |
| The Home Rule Bill | Anonymous | Monograph or Collective Volume | Cassell | 1912 |
| The importance of being Irish | Bestic, Alan | Monograph or Collective Volume | Cassell | 1969 |
| The Ulster canal | Cassells, Brian | Article in Journal | | 2002 |
| Tribute to Eric McElroy, 1933-2004 | Cassells, Brian | Article in Journal | | 2004 |