Following almost two years in Mexico she traveled from Laredo, Texas, to Washington D.C., where she addressed the Pan American Union, went on to New York, then toured Europe: In Madrid she published "Ternura" (Tenderness), a collection of lullabies and rondas written for an audience of children, parents, and other poets. In early 1925 she returned to Chile, where she formally retired from the nation's education system, and received a pension. It wasn't a moment too soon: The legislature had just agreed to the demands of the teachers union, headed by Mistral's lifelong rival, Amanda Labarca Hubertson, that only university-trained teachers should be given posts in the schools. The University of Chile had granted her the academic title of Spanish Professor in 1923, although her formal education ended before she was 12 years old. Her autodidacticism was remarkable, a testimony to the flourishing culture of newspapers, magazines, and books in provincial Chile, as well as to her personal determination and verbal genius.