"The Wild Swans at Coole" is a collection of poems that reflect upon the transformation of life and the unchanging aspect of nature. The author uses the symbol of swans to express the themes of love, loss, beauty, and the passing of time. The poems are marked by a strong sense of melancholy and longing, as well as an acute awareness of the transience of life. The collection is also notable for its exploration of Irish mythology and folklore.

"At the Hawk's Well" is a play that blends elements of Japanese Noh theatre with Irish folklore, focusing on the story of an old man who has spent his life waiting by a magical well that is guarded by a hawk-like creature. This well is said to grant immortality when its waters are stirred. The narrative unfolds as a young warrior arrives, seeking the same immortal waters. The play explores themes of obsession, the pursuit of unattainable goals, and the intersection of fate and free will, all conveyed through a combination of dance, masks, and poetic dialogue.