Francis van Helmont and the Alphabet of Nature by Je Wilson
This article has been published on the Public Domain website. It begins:
Largely forgotten today in the shadow of his more famous father, the 17th-century Flemish alchemist Francis van Helmont influenced and was friends with the likes of Locke, Boyle, and Leibniz. While imprisoned by the Inquisition, in between torture sessions, he wrote his Alphabet of Nature on the idea of a universal “natural” language.