This hand-drawn map, made by an unknown cartographer sometime in the early 18th century, shows the São Francisco River in Brazil’s Minas Gerais state. In the early 18th century, the Portuguese sent numerous expeditions up the São Francisco and its tributaries in search of gold, silver, and diamonds. Brazil -- History -- Colonial Period, 1500-1822; Carinhanha River; Colonial expeditions; Paracatu River; Rivers; São Francisco River; Tracks; Trails