[Dr. Dee's conjuring stone] [art original].[not after 1824]zxxWatercolor drawing depicting a speculum of kennel-coal, in a leather case, that was supposedly used by Dr. Dee the conjurer to deceive the mob in the reign of Queen ElizabethTitle devised by curator.Unsigned; artist not identified.Date based on date of William Bawtree's death.Depicted object was formerly owned by Horace Walpole and kept in the Great North Bedchamber at Strawberry Hill. For a description of the object, see British Museum online catalogue, registration no.: 1966,1001.1.Mounted on page 189 of William Bawtree's extra-illustrated copy of: Horace Walpole's A description of the villa of Mr. Horace Walpole (Strawberry Hill : Printed by Thomas Kirgate, 1784). See A.T. Hazen's Bibliography of the Strawberry Hill Press (1973 ed.), no. 30, copy 11.