F. M van Helmont's Alphabet of Nature was one of many books published about language in the early modern period. The "language debate," as it has come to be called, was a topic of compelling interest to major figures such as Reuchlin, Rabelais, Paracelsus, Agrippa, Postel, Boehme, Kircher, Hobbes, Descartes, Comenius, Spinoza, Locke, Boyle, Newton, and Leibniz. At issue were profound questions about whether language is natural or artificial,...