This volume includes "Nations in Tune: the Influence of Irish music on the Breton Musical Record" by Yann Bevant; "Ethnicity, Geography, and the Passage of Dominion in the Mabinogi and Brut Y Brenhinedd" by Christina Chance; "Rejecting Mother's Blessing: the Absence of the Fairy in the Welsh Search for National Identity" by Adam Coward; "Gwalarn: An Attempt to Renew Breton literature" by Gwendal Denez; "At the Crossroads: World War One and the Shifting Roles of Men and Women in Breton Ballad Song Practice" by Natalie Franz; "Apocryphal Sanctity in the Lives of Irish Saints" by Maire Johnson; " 'An Dialog wtre Arzur Roe d'an Bretounet ha Guynglaff' and Its Connections with the Arthurian tradition" by Herve Le Bihan; "A Walk on the Wild Side: Women, Men and Madness" by Edyta Lehmann; "The Early Establishment of Celtic Studies in North American Universities" by Michael Linkletter; " 'The Marshalled Fence of Battle of All the Men of Earth' A Reading of C Chulainn's First Recension r astrad" by Elizabeth Moore; "Dreams of Medieval Scottish Nationhood: The Epic Case of William Wallace" by Kylie Murray; " 'Some of You Will Curse Her' Women's Fiction During the Irish-language Revival" by Riona Nic Congail; "Dating Peredur: New Light on Old Problems" by Natalia I. Petrovskaia; " 'From the Shame You Have Done' Comparing the stories of Blodeuedd and Bl thnait" by Sarah Pfannenschmidt; " 'And There was a Fourth son Llefelys' Narrative Structure and Variation in Cyfranc Lludd a Llefelys" by Kelly Ann Randell; and "Fabricating Celts: How Iron Age Iberians became Indo-Europeanized during the Franco Regime" by Aaron Alzola Romero and Eduardo Sanchez-Moreno.

This volume includes: "The Influence of 19th century Anthologies of Celtic Music in Redefining Celtic Nationalism" by Graham Aubrey; "A Reactionary Dimension in Progressive Revolutionary Theories?" by Olivier Coquelin; "The Spiteful Tongue: Breton Song Practices and the Art of the Insult" by Natalie Franz; "Celtic Democracy" by D. Blair Gibson; "Pendragon's Ancestors" by Natalie Ginoux; "When Historians Study Breton Oral Ballads: A Cultural Approach" by Eva Guillorel; "The British Tristan Tradition" by Sabine Heinz; "Time and the Translation of the Breton Laws" by Heather Laird; "Judas, His Sister, and the Miraculous Cock in the Middle Irish poem Cr st ro crochadh" by Christopher Leydon; "Se principen nominat: Rhetorical Self-Fashioning and Epistolary Style in the Letters of Owain Gwynedd" by Patricia Malone; and "Abduction, Swordplay, Monsters and Mistrust: Findabair, Gwenhwyfa and the Restoration of Honour" by Sharon Paice MacLeod.

This volume of Proceedings of the Harvard Celtic Colloquium is graced with two J. V. Kelleher lectures: the 2019 lecture by Máire Ní Mhaonaigh on Irish chronicles and the 2021 presentation by Ruairí Ó hUiginn assessing the Irish genealogical corpus in its sociological context. It also includes Georgia Henley's 2021 keynote on the differing literary receptions in Norman Ireland and Wales of Geoffrey of Monmouth's history of Britain and related prophecies. Other articles in Volume 40 survey a wide array of topics in Celtic Studies, centering on Irish and Welsh material with the smaller language areas appearing as well, and ranging from medieval to modern times. While most are literary or linguistic in their focus, some historical context is also provided.

This volume of the Proceedings of the Harvard Celtic Colloquium offers a wide range of articles on topics across the field of Celtic Studies. It includes the 2017 J. V. Kelleher lecture delivered by Paul Russell, Professor of Celtic, University of Cambridge, entitled "'Mistakes of All Kinds' The Glossography of Medieval Irish Literary Texts." In this address Russell offers cogent analysis of this rarely addressed facet of medieval Irish codicology. The articles from other presentations at the Colloquium extend the focus on Celtic glossing into other areas of Celtic linguistics and literary studies. In addition, the volume includes articles on the medieval folkloric, religious, legal, and material culture of Celtic communities, some aspects of which persist into modernity. This volume exemplifies the broad range of topics and time periods characteristic of the Harvard Celtic Colloquium.

Proceedings of the Harvard Celtic Colloquium, 39 includes the 2019 J. V. Kelleher lecture by Máire Ní Mhaonaigh which centered on medieval Irish chroniclers' conceptions of past and present events in the wider world. Other papers expand the scope of this volume from the medieval into the early modern period, and into the early twentieth century.

In Volume 24: Manuel Alberro, "The Celticity of Galicia and the Arrival of the Insular Celts"; Brenda Gray, "Reading Aislinge Óenguso as a Christian-Platonist Parable"; and 6 other articles. In Volume 25: Timothy P. Bridgman, "Keltoi, Galatai, Galli: Were They All One People?"; Chao Li, "On Verbal Nouns in Celtic Languages"; and 6 other articles.