While she prays, she finds "a bright lady, surpassingly fair," the daughter of Lord Roland de Vaux of Tryermaine, and brings her home to her father's castle.  
The title character sneaks away and "kneels beneath the huge oak-tree / And in silence prayeth she" for her lover who is away fighting.  While she prays, she finds "a bright lady, surpassingly fair," the daughter of Lord Roland de Vaux of Tryermaine, and brings her home to her father's castle.  He swears to avenge the insult done to Geraldine, but this girl sees in Geraldine "those shrunken serpent eyes...that look of dull and treacherous hate" and begs her father Sir Leoline to send Geraldine away.  FTP, identify poem by Samuel Taylor Coleridge.
The title character sneaks away and "kneels beneath the huge oak-tree /
Christabel