The case of the prankish professor -- The case of Constant Doyle -- The case of the libelous locket -- The case of the two-faced turn-a-bout -- The case of the surplus suitor -- The case of the golden oranges -- The case of the lawful Lazarus -- The case of the velvet claws -- The case of the lover's leap -- The case of the elusive element -- The case of the Greek goddess -- The case of the skeleton's closet -- The case of the potted planter -- The case of the witless witness.