December 23, 1936. Ship passenger lists reveal that Barrios and his wife travelled as diplomats and arrived in Puerto Rico, a US territory, in January 1937. He reportedly suffered a myocardial infarction in front of the US Embassy in Guatemala City on October 27,1939, after it was discovered that he was travelling with phony diplomatic papers issued by his lifetime friend and Patron Tomas Salomoni. Having recently been in Germany, at the lead-in to the Second World War, Barrios was never again able to use his diplomatic connections. He was sent an invitation to leave Guatemala because of his political leanings. He accepted the invitation of Maximiliano Hernández Martínez, then President of El Salvador, to move to El Salvador and take up a position in the Conservatory and Declamation Rafael Olmedo. He was never to leave El Salvador. Past biographers suggested that, on August 7, 1944, he suffered a second myocardial infarction which caused his death, but this is still undetermined. A forensic physician has suggested that his death was more likely due to poisoning. At the time, Barrios' wife was carrying on an open affair with the Italian coffee plantation owner Pasquale Cosarelli, who was also residing in the Barrios household. Cosarelli was soon to marry Barrios' widow, and had both the motive and the chemicals to carry out the murder. Barrios was buried at Cementerio de Los Ilustres, having been carried there in the hottest week of the year on the shoulders of his students. In the hours after his death, his handwritten scores were stolen by his students along with his scrapbooks. Legacy Twelve "Mangoreanos" During his career, Barrios taught his patrons Luis Pasquet, Martin Borda Pagola, Dionisio Basualdo, Bautista and Lalyta Almiron, and Raul Borges. Following his extensive travels in Brazil, while he was an active performer and beginning in 1940, he wrote his guitar method to provide guitar instruction after arriving in El Salvador to selected students, mostly of Salvadoran nationality. They were known as the Twelve Mangoreanos: Luis Mario Samayoa ( -1969), Benjamín Cisneros ( -1987), Rubén Urquilla ( -1993), René Cortés-Andrino ( -1995), Mario Cardona Lazo ( -1999), Jesús Quiroa ( -2001), Jose Cándido Morales ( -2002), Julio Cortés-Andrino ( -2006), Cecilio Orellana ( -2007), Roberto Bracamontes ( -2007), Víctor Urrutia ( -2010) and Elena Valdivieso. Jose Cándido Morales and Roberto Bracamonte were the only ones to learn from Barrios as live-in students