The Hutt Golf Club: A Centennial History 1892-1992, Heritage Press, Wellington, 1992.
Spire on the Hill: A History of St Andrew's Church in the Epsom District 1846-1996, St Andrew's Parish, Auckland, 1996.
Bishop in the Dock: the Sedition Trial of James Liston, Auckland University Press, Auckland, 1997 (republished in 2006 by Irish Academic Press, Dublin).
Faith and Fraternalism: A History of the Hibernian Society in New Zealand, Hibernian Society, Dunedin, 2002.
'A Fair and Just Solution'? A History of the Integration of Private Schools in New Zealand, Dunmore Press, Palmerston North, 2002.
Above the City. A History of Otago Boys’ High School 1863-2013, OBHS Foundation, Dunedin, 2013.
Defending Trinity College Dublin, Easter 1916: Anzacs and the Rising, Four Courts Press, Dublin, 2019.
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'Daniel Mannix and his Biographers', Australian Studies, No.1, 1988, pp.61-71.
'Patrick Joseph O'Regan 1869-1947: A Life of Advocacy', Turnbull Library Record, Vol XXI, 2, October 1988, pp.93-7.
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'Second Thoughts on Historical Biography: Colm Kiernan and Daniel Mannix', Australian Studies, No.6, November 1992, pp.81-5.
‘Irish Catholicism in Australia and New Zealand', in Australia-New Zealand: Aspects of a Relationship, Proceedings of the Stout Centre Eighth Annual Conference, Wellington, 1992.
'"Bishop in the Dock": The Sedition Trial of James Liston', R. Phelan (ed), Irish-Australian Studies: Papers delivered at the Seventh Irish-Australian History Conference, July 1993, Sydney, 1994, pp.218-27.
Dictionary of New Zealand Biography, vols 2-5, Auckland/ Wellington, 1993-2000; essays on T.W. Croke, H.W. Cleary, R. Delargey, J.J. Kelly, J.M. Liston, and P.J. O'Regan.
'James Joseph Kelly (1877-1939)', Southern People: A Dictionary of Otago Southland Biography, Dunedin, 1998, pp. 265-6.
‘Always Elsewhere’, in Denis O’Connor, Big Aitche Little Aitche, Auckland, 2000, pp.90-95.
'"The Importance of Being Irish": Hibernianism in New Zealand, 1869-1969', L. Fraser (ed), A Distant Shore: Irish Migration and New Zealand Settlement, Dunedin, 2000, pp.135-54.
'Felice Vaggioli and Colonial Catholicism in New Zealand', in A Deserter's Adventures: The Autobiography of Dom Felice Vaggioli, Dunedin, 2001, pp.xv-xx.
'Pompallier's Legacy: A short history of the Catholic Church in New Zealand', New Zealand Geographic, No. 54, Nov-Dec 2001, pp.17-29.
'”How to behave among Protestants”: Varieties of Irish Catholic Leadership in Colonial New Zealand', B. Patterson (ed), The Irish in New Zealand: Historical Contexts and Perspectives, Wellington, 2002, pp.89-101.
'Unmaking New Zealand's state secular education system', in John Stenhouse and Brett Knowles (eds), The Future of Christianity: New Zealand. Historical, Sociological, Political and Theological Perspectives from New Zealand, Adelaide, 2004, pp.131-41.
'Towards a history of Orangeism in New Zealand', in Brad Patterson (ed), Ulster-New Zealand Migration and Cultural Transfers, Dublin, 2006, pp.154-64.
‘Beery Bill the Orangeman: Another Look at William Ferguson Massey', in James Watson and Lachy Paterson (eds), A Great New Zealand Prime Minister? Reappraising William Ferguson Massey, Otago University Press, Dunedin, 2011, pp.77-86.
'”Waving the green flag” in the southern hemisphere: the Kellys and the Irish College, Rome,’ in Dáire Keogh and Albert McDonnell (eds), The Irish College Rome and its World, Four Courts Press, Dublin, 2008, pp.205-24.
‘”Who fear to speak of Easter week?” Antipodean Irish Catholic Responses to the 1916 Rising,’ in Ruan O’Donnell (ed), The Impact of the 1916 Rising. Among the Nations, Irish Academic Press, Dublin, 2008, pp.71-90.
‘Paul Cullen and the Remaking of Catholicism in the Antipodes,’ in Dáire Keogh and Albert McDonnell (eds), Cardinal Paul Cullen and his World, Four Courts Press, Dublin, 2011, pp.377-400.
Dictionary of Irish Biography, Cambridge University Press, Cambridge, 2009: essays on H.W. Cleary, J.J. Kelly and W. F. Massey.