The author attributed this story to Livy, though it may also be found in Le Roman de la rose.  
The author's friend John Gower included a version of this story in his Confessio Amantis.  The author attributed this story to Livy, though it may also be found in Le Roman de la rose.  Centering on the theme "Forsaketh synne, er synn yow forsake," this story tells of Claudius' false testimony on behalf of a wicked judge.  Claudius attests that the main character's daughter is his slave, causing Virginia to have her head cut off by her father and delivered to the judge Appius.  Centering on the virtuous knight Virginius, FTP, identify this part of The Canterbury Tales told by a medical professional.
The author's friend John Gower included a version of this story in his Confessio Amantis.  
The Physician's Tale