They were popular in both Europe and the Orient during the 17th and 18th centuries and were often used to carry messages of political protest or support. In the example, right, the face of Bonnie Prince Charlie – whose image was outlawed after the Young Pretender’s uprising in 1745 – is revealed when a specially made, brightly polished metal cylindrical mirror is placed on the painting.
The cylinder is put on top of a satyr’s face and faces the rising sun. All good Jacobite symbolism, but the painting is valued for the strength of the image and the good likeness that emerges.
Previously sold at Christie’s Fingask Castle sale in April 1993, it has also been exhibited at The New Gallery in London and is expected to fetch £1500 to £2000 at Bonhams’ sale.
