(According to "Killing Kings", a paper that will appear on the website of the British Journal of Criminology on Monday 31 January, a statistical study of the demise of 1,513 monarchs in 45 European monarchies over the period 600 to 1800 revealed that almost a quarter (22 per cent) of all royal deaths were bloody - accidents, battle deaths and killings - and that 15 per cent of all deaths were outright murder. Heavy is the head that wears the crown.)