Antonio del Rincon's Arte mexicana (Mexico, 1595)

The Nahuatl grammar printed at Mexico City by Pedro Balli in 1595, written by a Jesuit who was himself a Nahuatl speaker from Texcoco. Fifty years before Carochi's celebrated accents, it devotes a section to the saltillo, states the rules for where that glottal stop falls, describes how sounds change when words meet, and closes with a list of Nahuatl words differing in meaning only by vowel length or saltillo — the analysis Carochi said was taught there "con tanto magisterio".