Science and invention in Birmingham 1054 Mk XVIs) had been built. CBAF became the largest and most successful plant of its type during the 1939–45 conflict. As the largest Spitfire factory in the UK, by producing up to 320 aircraft per month, it built over half of the approximately 20,000 aircraft of this type. 1944: Anthony Ernest Pratt takes out his first patent for a board game named 'Murder', this is later to become the world-renowned murder mystery game 'Cluedo'. 1946: Chance Brothers produce the first all-glass syringe with interchangeable barrel and plunger, thereby allowing mass sterilisation of components without the need for matching them.
Mystery fiction contrasted with hardboiled detective stories, which focus on action and gritty realism. Mystery fiction may involve a supernatural mystery where the solution does not have to be logical, and even no crime involved. This usage was common in the pulp magazines of the 1930s and 1940s, where titles such as "Dime Mystery", "Thrilling Mystery" and "Spicy Mystery" offered what at the time were described as "weird menace" stories—supernatural horror in the vein of "Grand Guignol". This contrasted with parallel titles of the same names which contained conventional hardboiled crime fiction. The first use of "mystery" in this sense was by