Cupid, Flora, Ceres and Esculapius honouring the bust of Linnaeus.. Stipple engraving by Maddochs from a painting by Russell and Opie from Dr. Robert John Thornton's "Temple of Flora," 1812, Lottery or quarto edition. The illustrations were a mix of aquatint, mezzotint and stipple engravings finished by hand. Dr. Thornton (1768-1837) was a botanist and publisher who bankrupted himself producing what is now regarded as the greatest English botanical book.