Duffy, Patrick J. (2004) 'Disencumbering our crowded places': theory and practice of estate emigration schemes in mid-nineteenth century Ireland. In: To and from Ireland: planned migration schemes c. 1600-2000. Geography Publications, pp. 79-104. ISBN 0 906602 37 8

Duffy, Patrick J. (2004) Unwritten Landscapes: Reflections on Minor Place-names and Sense of Place in the Irish Countryside. In: Surveying Ireland's past: multidisciplinary essays in honour of Angret Simms. Geography Publications, pp. 689-712. ISBN 0 906602 42 4

Duffy, Patrick J. (1992) Assisted emigration from the Shirley estate 1843-54. Clogher Record, XIV (2). pp. 7-62. ISSN 0 949012 09 2

Duffy, Patrick J. (1990) A lease from the estate of the Earl of Essex 1624. Clogher Record, XIII (3). pp. 100-114. ISSN 0 949012 07 6

Duffy, Patrick J. (1981) Patterns of landownership in Gaelic Monaghan in the late sixteenth century. Clogher Record, X (3). pp. 304-322. ISSN 0 9501047 5 2