The notes were made by comparing the critical editions by Eleuterio F. Tiscornia, Ed. Losada, Buenos Aires, 1941; by Carlos Alberto Leumann, Ed. Angel de Estrada, Buenos Aires, 1945; and by Santiago M. Lugones, Ed. Centurión, Buenos Aires, 1948; their own notes compared between them and with the critical edition by Elida Lois and Angel Nuñez, Ed. ALLCA XX (Association Archives de la Littérature Latinoaméricaine, des Caraïbes et Africaine du XX Siècle), Paris 2001; with the notes by Leopoldo Lugones in El payador, Ed. Centurión, Bs. As. 1948 (and Stockcero 2004), those of Francisco Castro in Vocabulario y frases del Martín Fierro, Ed. Kraft, Bs. As. 1950, and those of Domingo Bravo in El Quichua en el Martín Fierro y Don Segundo Sombra, Ed. Instituto Amigos del Libro Argentino, Bs. As. 1968.