 His works were published in academic publications in Paraguay, Uruguay, Mexico, Argentina, Brazil, Austria, France and the USA.In 1949 President Felipe Molas López appointed him "Protector of Indians", but he later lost favour with the thuggish dictator Alfredo Stroessner who tried to politicize and dismantle the organization protecting the indigenous group.Cadogan died in 1973 after forty years dedicated to the Guaraní cause and denunciation of the systemic persecution and abuse they had been subjected to.