“Plan del curso de los Rios Huallaga y Ucayali,” [Lima, ca. 1830].
This map of the Huallaga and Ucayali rivers, a colonial frontier region, was first published Mercurio peruano, Lima, 1791, with a dedication to Carlos IV of Spain. Key at lower left indicates towns populated by Spaniards, Christian Indians subject to Spain, and independent non-Christian, Indians, as well as Spanish-controlled territory and paths through the mountains.