Short story where Arthur Conan Doyle warns his country in the run up to the First World War about the danger from enemy submarines and argues for greater national self-sufficiency in foodstuffs and/or a Channel Tunnel. The fictional vehicle for this warning comes through the defeat of Britain by the small fictional country of Norland, whose naval fleet and harbour is destroyed, but which defeats Britain through destroying of food ships and starving is population, leading to food riots and uprisings across the country. An interesting piece. ( )