"Significant study and stunning facsimile of a postconquest 'historical genealogical' manuscript from a town in the Valley of Mexico containing descriptions of lands said to have been given out by Itzcoatl in 1439, historical information about prehispanic rulers of Tenochtitlán and Tlatelolco, Tenochtitlán's conquest of Tlatelolco in 1473, genealogical information about Xochimilco, and some limited astrological information"--Handbook of Latin American Studies, v. 58.