Deirdre of the Sorrows is a three-act play written by Irish playwright John Millington Synge, first performed at the Abbey Theatre by the Irish National Theatre Society in 1910. The play is based on Irish mythology, in particular the myths concerning Deirdre and Conchobar. The work was unfinished at the author's death in 1909, but was completed by William Butler Yeats and Synge's fiancée, Molly Allgood.
[from Wikipedia]