life and devotion to the Virgin and her image. "Nican Tlantica" The sixth section, the "Nican Tlantica" (Nahuatl: "Here ends"), is a general history of the Virgin in New Spain and an exhortation to her devotion. Final prayer The seventh section is another prayer, this one following the structure of the . Publication and authorship The responsibility for the composition and authorship of the is assigned by many contemporary Nahuatl scholars and historians to Luis Laso de la Vega, vicar of the chapel at Tepeyac. There is some possibility that Laso de la Vega had collaborators in the composition of the work, but there is insufficient material evidence to demonstrate whether one or more hands were involved in the construction of the Nahuatl-language text. The work was initially published under the auspices of Dr. Pedro de Barrientos Lomelín, vicar general of the Mexican diocese, at the press of Juan Ruiz in 1649. In 1666, Lic. Luis Becerra Tanco (1603–1672), a secular priest, affirmed that the Nahuatl account was based on long-standing oral tradition in a deposition for the inquiries of Francisco de Siles, who was commissioned to compile documentation of the continuity of the Virgin's popular cult since the time of her apparition. Becerra Tanco later elaborated on this position in his ("Mexico's Happiness" of 1675, claiming that Laso de la Vega's text must have been based on documents created through collaborations between the Franciscan faculty of the College of Santa Cruz Tlatelolco and their indigenous pupils shortly after the apparition itself and purported to have been in the custody of Fernando de Alva Cortés Ixtlilxochitl. He even claimed to have seen among these papers "a manuscript book written in the letters of our alphabet in an Indian's hand in which were described the four apparitions of the Most Holy Virgin to the Indian Juan Diego and his uncle Juan Bernardino." Other scholars who have disputed Laso de la Vega's authorship include Francisco de Florencia, a Jesuit chronicler, who assumed that the "Indian manuscript" mentioned by Becerra Tanco was written by Jerónimo de Mendieta, (d. 1605), a Franciscan missionary and historian in early New Spain, and Carlos de Sigüenza y Góngora, Florencia's censor, who, by way of correction of his charge, swore that he "found this account among the papers of Fernando de Alva. [...] The original in Mexican [Nahuatl] is of the letter of don Antonio Valeriano, an Indian,