Correspondencia Oficial e Inedita sobre la Demarcacion de Limites entre el Paraguay y el Brasil

The volume assembles official and unpublished letters, reports, and field notes documenting efforts to demarcate the frontier between Paraguay and Brazil. Correspondence records practical surveying work, contested identifications of rivers and landmarks, debates over whether indigenous territories should be neutral or assigned, disputes with Portuguese commissioners, and frustrations with Spanish administrators. The writer details geographic observations, sketches, justifications grounded in treaties, logistical impediments, allegations of obstruction and corruption, and proposals for provisional measures pending formal adjudication. The material combines technical description, diplomatic exchange, and personal commentary on the obstacles to implementing a negotiated boundary.