6040391 Rev. Richard Watson (pastel on grey paper) by Sharples, James (1751-1811); Bristol Museum and Art Gallery, UK; (add.info.: Not Dated A framed colour drawing on grey paper, showing: a half-length portrait in profile of the Reverend Richard Watson (1737-1816), a chemist and later ordained minister who became the Bishop of Llandaff from 1782 until his death; before he was ordained, in 1768, Watson\'s career as a chemist saw him work on gunpowder (resulting in an explosion which damaged his house), as well as the efficiency of thermometers and the use of lime in tar and lead smelting); by Bristol Museums, Galleries & Archives ; Purchased 1931; English, out of copyright.