 "It should be pointed out here that the previously unknown, "Descripción de los reinos, Libro que trata del descubrimiento y principio del estrecho que se llama de Magallanes, por Ginés de Mafra", published in Madrid, 1920 in "Tres Relaciones" could not be based on more than Mafra's memory of what he might have read in a Tratado begun by San Martín.