 Among others works, he published "Seven Liberal Arts in the Middle Ages", "Trip to the Araucania", "Treatise on Physical Geography", "Quechua" and "Ornithology of the Valley of Cochabamba, Bolivia and its Surroundings", being the latter the first meaningful scientific work in the branch of ornithology written on this region.His wife died in 1885, marking a crucial moment in his life.Referring to this event, he wrote a friend