Possible Clues:

• Prophet appearing as the ultimate character in a particular period
• Western Union co-founder Cornell
• II Chronicles follower
• Pound of letters?
• Book that tells of the reign of Cyrus the Great
• ___ Pound, poet
• Pound with a metric system?
• Book that tells of the reign of Cyrus
• Metrical Pound
• A book that's OTT - only two-thirds of it!