Аннотация:During the heightened cultural activity of the Celtic Revival, the moral ownership and utilisation of Ireland's literary remains became an important cultural issue. At the same time, many nineteenth- and early twentieth-century Irish writers were concerned to ‘retell’ ancient stories in ways which explored their relevance to the modern world. One of the most retold tales from the period was the story of Déirdre and the Sons of Usnach. The story of Déirdre broaches one of the most ubiquitous of human experiences – betrayal – and it does so in relation to both political and interpersonal behaviour. This essay examines two dramatic treatments from the early years of the century: W.B. Yeats's one-act Deirdre (1907) and J.M. Synge's Deirdre of the Sorrows, unfinished at the time of his death and finally published in 1910. This essay looks to account for the particular ways in which each author inflects the legend in terms of their own concerns, and in particular how both Yeats and Synge engaged with a discourse of betrayal that – although always significant in Irish cultural history – was moving to a position of centrality in Irish national life in the years leading up to the revolutionary period.