Graham Priest is a retired headmaster. He has been collecting bayonets since 1957, specialising in socket bayonets since 1972. His previous publications include 'The Brown Bess Bayonet 1720-1860' (1986), 'The Spirit of the Pike: British Socket Bayonets of the Twentieth Century' (2003), 'The Bayonets of the Grand Master's Palace, Malta', (200), 'Biddestone: "A Peaceful Wiltshire Village"' (2013), and more than 200 specialist articles. He lectures at the Tower of London and Imperial War Museum.