Francisco Xavier de Gamboa, Comentarios a las ordenanzas de minas (Madrid, 1761)

The commentary on mining law written by a Mexican-born lawyer acting as the Mexico City merchants' deputy at the court of Madrid, and printed there in 1761. It is law and metallurgy in one book: alongside the ordinances it explains the working vocabulary of the mines, some of it borrowed from indigenous languages, records who invented which method of extracting silver and in what year, and reprints in full the harshest contemporary indictment of the Indies mines before answering it.