On May 5, 1865, Domingo Faustino Sarmiento returned to the United States as Envoy Extraordinary and Minister Plenipotentiary from the Argentine Republic. A more accurate title would have been Envoy Extraordinary and Minister Peripatetic, for no other minister or ambassador has ever spent as much time traveling through the United States, talking to its people, and studying its institutions. He was fifty-four years old now, an aging man whose clothes were formal but untidy, whose manner was truculent and conceited, a passionately opinionated man who stated his beliefs with fire and vigor and was rude to the point of insolence to those who sought to waste his time with frivolity—and yet who managed to form many warm friendships and to arouse in many Americans a personal liking for himself and an interest in his country. He was to spend three years and four months in the United States, and they were to be years crammed with work—studying, collecting information to send to Argentina, traveling, and writing. He wrote constantly. Dozens of letters came to him every day, and he wrote dozens himself. He reported often to Argentina's Minister of Foreign Relations, and he wrote constantly to friends and advisers in the United States. During his stay in America he wrote numerous newspaper articles, on topics as varied as grape culture, votes for women, and export laws. He started a periodical, Ambas Américas, whose mission was to draw the United States and all Latin American countries closer together. He wrote and published two books: Vida de Abrán Lincoln, the first biography of Lincoln in Spanish, and Las escuelas: base de la prosperidad y la república en los Estados Unidos. He translated a book on school architecture and a biography of Horace Mann into Spanish.