By David Quantick
By The Puzzle Society
By David J. Bodycombe
By Igloo Books
By Barton, Helen
By Helen Barton
By Daily Mail
By Melhuish, Simon, Clode, Linley
By Bellos, Alex
By Carolyn Howitt
By Sullivan, Norman
By Sergei Urban
By Denis McQuail, MA, PhD, DipPSA
By George Courtauld
By Bill Edgar
By Roy Preston, Sue Preston
By Cookson, Catherine
By Stewart, Ian
By Tim Dedopulos
By Sidney Paget, Dr Gareth Moore, George Wylie Hutchinson
By Donegan, Matthew
By James Van Hise
By David McCandless
By Denise Kiernan, Joseph D'Agnese
By Rupert Matthews
By Alex Horne