Episode summary: The tattered book worth risking everything for, the man who can’t forget and chronicling history one voice message at a time. Josie Long presents short documentaries and adventures in sound about record keepers. Memories Featuring Bob Petrella Produced by Andrea Rangecroft Messages from Manus Island Featuring Behrouz Boochani Produced by Femi Oriogun-Williams The Exercise Book Featuring Jeremiah Produced by Andrea Rangecroft Production Team: Eleanor McDowall and Alia Cassam Produced by Andrea Rangecroft A Falling Tree production for BBC Radio 4