This 19th-century map shows the Doce and Jequitinhonha rivers and their tributaries in the southeastern Brazilian state of Minas Gerais. The map, which was copied from an older original, is the work of José Raimundo da Cunha Matos (1776-1839), a Brazilian military historian and founding member of the Brazilian Historical and Geographic Institute. Although Minas Gerais is best known for the gold and diamond mines that gave the region its name, agriculture became more important to the regional economy over the course of the 19th century, as the mines were exhausted. Brazil -- History -- Colonial Period, 1500-1822; Doce River; Jequitinhonha River; Rivers