H.D.'s "Eurydice" centers on the ancient Greek myth wherein Eurydice, wife of Orpheus, is kidnapped by Hades. Orpheus, desperate to get her back, travels to the Underworld to retrieve her. Hades strikes a deal with Orpheus, that if he can make it to the surface overworld without looking back to check if Eurydice is there, then he and her are free from his influence in the underworld. Orpheus, upon looking back, loses Eurydice forever.
H.D. approaches this mythos with a finely tuned feminist twist. She shifts the perspective of the narrative to that of Eurydice after Orpheus has failed his task in believing her constancy in returning to the overworld. Importantly, despite a tone of efficaciousness, Eurydice is effectually powerless as her autonomy is stripped of her by Hades. This, in my personal opinion, is either a critique of the masculine-centric patriarchal world in which we live, or by contrast, a critique of male lovers by H.D. who was famously openly bisexual, having relations with both men and women.