Some significant items have been acquired by museums after being sold once their owners were appraised of their true value. An example is the watercolour painting "The Artist's Halt in the Desert" by Richard Dadd, discovered and shown by Peter Nahum in 1986 and purchased the next year by the British Museum for £100,000. Another such item, later dubbed "Ozzy the Owl", is a Staffordshire slipware jug, valued by Henry Sandon on a 1990 show at £20,000 to £30,000, and subsequently acquired by Potteries Museum & Art Gallery.