Dark Agnes de Chastillon (also known as Agnes de Chastillon, Dark Agnes, Agnes de la Fere and The Sword Woman) is a fictional character created by Robert E. Howard and the protagonist of three stories set in 16th Century France, which were not printed until long after the author’s death.
The character of Agnes was beaten by her father and almost forced into an arranged marriage. She avoids this by killing the bridegroom and running away. She meets Etienne Villiers, who at first attempts to sell her to a brothel, and Guiscard de Clisson, a mercenary captain who trains her as a swordswoman. When de Clisson is killed, Agnes heads for Italy with Villiers.
The story in this chapbook is the second where Agnes, still with her sidekick Etienne Villiers, faces international intrigue with Cardinal Thomas Wolsey.