 Guevara arrived in Mexico City on 21 September 1954 , and worked in the allergy section of the General Hospital and at the Hospital Infantil de Mexico . In addition he gave lectures on medicine at the Faculty of Medicine in the National Autonomous University of Mexico and worked as a news photographer for Latina News Agency . His first wife Hilda notes in her memoir My Life with Che , that for a while , Guevara considered going to work as a doctor in Africa and that he continued to be deeply troubled by the poverty around him . In one instance , Hilda describes Guevara 's obsession with an elderly washerwoman whom he was treating , remarking that he saw her as " representative of the most forgotten and exploited class " . Hilda later found a poem that Che had dedicated to the old woman , containing " a promise to fight for a better world , for a better life for all the poor and exploited . " 
