Irish Folk-History Plays (Barnes & Noble Digital Library): First Series, The Tragedies

This 1912 collection of plays by Lady Gregory, dedicated to Theodore Roosevelt, contains three tragedies:  Grania, Kincora, and Dervorgilla.  Many critics believe that Grania, in which she takes a traditional myth glorifying female self-sacrifice and gives it a feminist reinterpretation, is her masterpiece.