Possible Clues:

• Someone like Pepys
• Samuel Pepys, for one
• Walter Scott, for one
• One such as Pepys
• Pepys or Frank
• Person who keeps daily record of activities, like Samuel Pepys
• Writer is under attack having overturned first of theories
• Record keeper
• One who keeps a daily record, like Samuel Pepys
• It's 24 down work for 11, 12, 22 down, 24 9 or 25