Acknowledgements

Terence Meaden, Stewart Home, and Tim Healey all supplied me with background material, which I greatly appreciate. My partner, Suradech Chotiudompant, has suggested numerous improvements and additions, as has my sister, Claire Hunt. My friends and colleagues Will Barton, John Yeadon, Andrew Beck, Sam Dunn, Andrew Pittaway, Tim Hall-Randle, Filippo Ulivieri, Val Hill, Martin Joiner, Shaun Hides, Peter Playdon, Antoine Maire, Maria Weir, and Nick Wallwork have all given helpful advice.

Many people have emailed useful suggestions: Adrian Fernand, Francois Gauvin, Emma Desborough, Petr Hrubis, Alexandr Kornev, Mark Jones, Padraig O Mealoid, Sarah Nelson, Howard Peirce, Arnoud Berendsen, Lily Espinoza, Pierce Butler, Mark Brunner, Owen Massey, Richard Russell, Simon Smith, SoulReaver, Stewart Ferris, Gloria Bertonis, Fionnuala Sheehan, Katherine Prown, John Mehlberg, Ben Devlin, Nicholas MacKinnon, Joel Anderson, Bob Teeter, Phil Stead, and Edward Wellbourne.