Part Four/Eighteen Summary

Costanza wants to make a pilgrimage to Canterbury in the hope that St. Thomas will help with her bloody flux condition so she can bear more children for Castile. She tells John that her father wants John to revenge his death, and John wants nothing more than to take Castile. Costanza makes him swear on the finger she wears around her neck belonging to Santiago that Katherine will not keep him from doing this. He escorts Costanza to her bed. She smells bad due to her pious denial of the physical body. Brother William has declared her sane and says that she is sick due to astrological reasons, as well as because of John's relationship with Katherine. Brother William makes a veiled accusation about Nirac's death and warns the duke to beware for his soul. Rather than punish him...