Possible Clues:

• Pepys, for example
• Detective happens to interrupt cunning chronicler
• One records attack being repulsed first
• Writer is one infiltrating Triads in disguise
• I'd upset member of the upper class, not half -- I've put something on record
• One like Pepys
• Leo opts out of editorials writing for The Daily Record
• Triad is new writer
• Pepys was strangely staid about religious instruction at first
• Pepys, perhaps, raids it roughly