Sherlock Holmes and the missing jewels, Sir Arthur Conan Doyle

In ‘The Beryl Coronet’ (1892), a banker is holding a small crown as collateral. When three of the crown’s beryls vanish, seemingly at his own son’s hand, the banker calls on Holmes to clear his family’s name and recover the missing jewels. ‘The Six Napoleons’ (1904) sees a series of break-ins resulting in the theft and destruction of several plaster busts of Napoleon. Could there be a radical Napoleon hater on the loose, or is there a more sinister scheme behind the robberies? Finally, in ‘The Mazarin Stone’ (1921), Holmes has been tracking and following a diamond thief, but in protecting the valuable jewel, the master detective might have placed his life in the centre of a dark and dangerous plot.