Possible Clues:

• Something kept people in assembled circle
• A passage from Kenneth Roberts
• So that people won't forget to have a tome around them
• Note about entire first half is a keepsake
• This reminds me doubly not singularly
• To remind me at the double not to get confused
• Souvenir of doctor sheltering soldiers in film
• Short note sent round hospital department as a reminder
• It serves as a reminder
• People behind the writer, against a trophy