Possible Clues:

• Originator of the phrase 'Let the punishment fit the offense'
• 'O tempora! O mores!' orator
• Roman who originated the phrase 'While there's life, there's hope'
• Greek-speaking orator as guide (not to Tyneside)
• Famed Roman orator
• 'Laws are silent in times of war' speaker
• Eloquent character, one finishing cake amid company
• 'De Oratore' writer
• 'Cassius: Did -- say anything? Casca: Ay, he spoke Greek.' (Julius Caesar)
• Roman orator/statesman/writer