PERU - RARE - "PLAN del Curso de lors Rios HUALLAGA y UCAYALI, y de la pampa del Sacramento: levantado por el Fr. Manuel Sobreviela, Guardian del Colegio y Ocopa en 1790, corregido y anadido en 1830 por Dr. Amadeo Chaumette Des Fossés [...]". RARE old map of a part of the North-East of Peru engraved by Joseph Vasquez. Printed on laid paper and published in LIMA. Margins. The key at the bottom left indicates the cities populated by Christians, converts and non-converts, symbols defining the territory occupied by the converts and the paths through the mountains. 44 x 32,3 cm. Condition A/B (some traces of handling folds).