Textual and visual material consisting mainly of notes, drawings and plans, documenting early Christian Irish art, its inspiration and the extent of its influence in Europe, in areas including architecture, sculpture, manuscripts, metalwork, ivory and textiles.

[Handwritten notes and pencil sketches relating to illuminated manuscripts of the twelfth and thirteenth centuries.]

[Pencil sketches on tracing paper of decoration in the manuscript (Lindau Book cover (New York). Handwritten notes regarding the parallels with 'North-East Central Asian Bronzes'.]

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.

A selection of manuscript material from the Irish Dialect Archive (Cartlann na gCanúintí) of the School of Irish, Celtic Studies, Irish Folklore and Linguistics at UCD.

Correspondence between John O'Donovan (1809-1861), and, principally, William Reeves (1815-1892): eighty letters (1832-1860) and twenty-six undated note fragments.

[Research notes relating to the manuscript of St. Gall Priscian, 904.]

[Research notes and pencil sketches relating to manuscripts held in the National Library, Turin.]

[Notes on the Tournai Shrine.]

[Notes and pictures relating to the Emly, Moymusk, Roscommon, Shannon and Lough Erne Shrines.]

[Notes for an article discussing Italian painting from the thirteenth to the sixteenth centuries.]

[Research notes relating to the illumination of the manuscript (Turin O.IV.20) and list of folio numbers.]

[Research notes and illumination relating to the text of the Leyden Priscian manuscript.]

[Research notes and pencil sketches relating to background to the manuscripts in the Vatican Library.]

[Research notes relating to the decoration of the Add. MS 36929 (British Museum). Includes notes by another hand and typed and handwritten Latin transcription of part of the text.]

[Pencil sketches in colour of decoration from various folios from Galba A.V. (British Museum).]

[Paris Manuscripts. Facsimile images all mounted for inclusion in the catalogue of images. Those with numbers on the mounts have photographs already in the photographic collection.]

[Research notes relating to different books and references on Early Christian Art.]

Handwritten notes of paleographical abbreviations, list of manuscripts to photograph, and comparison sketches between Vat. Lat. 1202 and Bertaux.

[Handwritten research notes concerning The Rabula Gospels in the Laurentian Library, Florence.]

[Research notes relating to enamel and two journal articles on antique glass and beads by Gustavus A. Eisen.]

[Research notes relating to the Soiscéal Molaise.]

[Research notes and sketches relating to the Bell Shrine in the British Museum.]

[Research notes relating to the decoration and metalworking techniques on the Shrine of the Bell of St. Cullan.]