An Original Handwritten Letter Signed by Lyon Playfair to Levi Leone. Dated 1862. A long letter commenting on the 1862 exhibition, and the representation of classification systems there. Suggesting improvements and recalling the 1851 exhibition. Lyon Playfair, 1st Baron Playfair 1818-1898 was a British scientist and Liberal politician who was Postmaster-General from 1873 to 1874. Levi Leone, 1821-1888. English jurist and statistician. His chief work, History of British Commerce and of the Economic Progress of the British Nation, 1763-1870, is considered to be a partisan account of British economic development. Size is 175mm x 110mm. Condition is good. Light folding creases.