The Codice Ramirez - an anonymous Nahua history recovered in 1856, printed in 1878

A sixteenth-century manuscript written in two columns with the right-hand column left blank, which its finder read as a Spanish translation of a Nahuatl original by an indigenous layman. It was pulled out of a Mexico City convent being demolished on a September night in 1856, and when it was printed in 1878 the editor showed that it is the core of Diego Duran's famous history, copied almost word for word, and behind the passages of Acosta that made his reputation.