This fifth volume of the Mediaeval Continuation is the fourth of the letters of Peter Damian, an 11th-century monk and man of letters. Written during the years 1062-1066, these letters deal with a wide variety of subjects. Some letters are of historical interest, others approach the size and scope of philosophical or theological treatises. Damian's correspondents range from simple hermits in his community to abbots, bishops, cardinals and even to Pope Alexander II. Among these letters are to be found one addressed to the patriarch of Constantinople, two to Damian's sisters, one to the Empress Agnes, and even a few to such distant personages as the young King Henry IV and the Archbishop Anno of Cologne.