The first thesaurus was created by Dr Peter Mark Roget in 1805.
What was his story? What inspired him to create this monumental work? How did he go about classifying and assorting the synonyms and antonyms?
Roget's interesting life and legacy, the theoretical links to Leibniz and Aristotle, and even the trademarking of the name 'Roget' will be addressed by Dr John Old.