Papers deriving from the Fitzgerald family of Maynooth Castle and Carton, Co. Kildare, Earls of Kildare and Dukes of Leinster, 1250-1949, and relating to the province of Leinster in general and to Co. Kildare in particular, with some material concerning the family's Co. Down estate which at one time embraced the whole barony of Lecale. Up to the early 19th century, the papers relate almost exclusively to the family's estates in Ireland and to the municipal affairs of the boroughs of Harristown and Athy, Co. Kildare. Thereafter, the bulk of the papers consist of personal, political and business correspondence, 1809-1874, of the 3rd Duke of Leinster, leader of the Irish Whigs and Lord Justice during the Famine, covering every topic of interest at the time.
The principal strength of the collection lies in the wide range of detail available for the study of the Leinsters
28 volumes and approx.1,800 documents occupying 27 PRONI boxes.
See PRONI references D/3078 and MIC/541 for catalogues of the papers. The catalogues are available for consultation in PRONI's Public Search Room.
See also http://www.proni.gov.uk/records/private/leinster.htm for a more detailed introduction to the collection.