Correspondence relating to O'Curry's work with the Ordnance Survey and the Royal Irish Academy and general correspondence on antiquarian, genealogical, linguistic and literary matters; correspondence as Professor of Archaeology and Ancient Irish History in the Catholic University, mainly concerning his academic and research interests; some personal correspondence, and personal financial and family documents.

Letters from correspondents primarily in the British Isles, but also from North America and the Middle East, encompassing a wide range of antiquarian concerns including archaeological finds, anatomy, sigillography, topography, numismatics, and Frazer's collection of autographs and prints.

The Irish Virtual Research Library and Archive (IVRLA) is a digitisation project launched in UCD in January 2005. The project was conceived as a means to increase and facilitate access to UCD’s cultural heritage repositories through the adoption of digitisation technologies.

[Letter from George Stephens to Eugene O'Curry, discussing O'Curry's health; Irish manuscripts in Scandinavia; and the origin of a casket.]

[Letter and two memoranda from [C.?] W. Quin (Ballyornan) to William Monck Mason (Kildare Street, Dublin), concerning the earthen vessel uncovered on November 1796, at Mr. Chas Quin’s Farm, Ballyornan, Parish of Powerscourt, Co. Wicklow.]

[Letter from [C. T. ?] Herbst (Rosenborg) to William Frazer, thanking him for his intention to propose Herbst for honorary membership of the Royal Irish Academy; also encloses descriptions of finds of coins and antiquities, and a catalogue of "our Museum of northern antiquities".]

[Sketches and notes relating to to bronze objects, brooches, bracelets and heads in the British Museum.]

[Notes, correspondence and sketches relating to goldsmith techniques on a variety of objects.]

[Notes and sketches relating to artifacts from the National Museum of Scotland.]

[Pictures from postcards and sketches relating to artifacts mainly in the National Museum of Ireland.]

[Research notes and sketches relating to hanging bowls found in Ireland and Britain.]

[Letter from Robert Day (Myrtle Hill House, Cork) to William Frazer, mainly concerning gold items he purchased from a jeweller in the North [Broighter gold hoard].]

[Letter from Robert Munro (48 Manor Place, Edinburgh) to William Frazer, concerning five gold fibulae lately discovered in the south of Ireland.]