Possible Clues:

• Style of neat round handwriting
• Police officer delayed digesting papa’s ornate writing
• Busy with homework, up well into the night writing
• Small change to portion of handwriting
• Ornate writing of busy schoolgirl finally introduced to Head?
• *Engraver's surface
• Officer by river to give a hand
• Police officer quietly delayed writing
• Constable print gets a good hand
• Sort of writing that may be highly polished