The volume is entitled: "Memoria sobre a Capitania das Minas Geraes seu Territorio, China, e Produccoes Metalicas; sobre a necesside de se restabelecer e animar a Mineracao decadente do Brazil sobre e Comercio, e Exportacao dos Metaes e Intereses Regios. Com ... Appendice sobre es Diamantes e Nitro natural. Indo por ordeur de Sua Magestade Ano de 1799". Cover bears msanuscrip note 'Bought in R. Southey's sale May 1844', and label from sale catalogue which states 'a valuable collection of Documents on the Minas Geraes (Bahia) copied from the originals by an English Mining Engineer'. Also included is 'Proposals for a Diamond Contract in the Minas Geraes ... in 1740'; production statistics 1734-1794; notes on laws and regulations governing the mines (e.g. of 1608 and 1618); 'Note sur les Diamants'; 'Coinage in Spain'; notes 'On Diamonds' with statistics 1772-1790; 'Project for a Tobacco Contract in the Minas Geraes' etc.