Fig. 1From: XRF elemental analysis of inks in South American manuscripts from 1779 to 1825Studied historical documents (1778–1830). A Lawsuit of José Gabriel Tupac Amaru II (1779); B Report of Mateo Pumacahua (1792); C Order of José de la Serna (1822); D Report of Agustín Gamarra (1825). E Order of Juan Ángel Bujanda (1830)Back to article page