*Proofs of a Conspiracy* (1798) is a polemical non-fiction tract by Scottish scientist John Robison, written in the tradition of Enlightenment-era anti-secret-society literature. In this opening section, Robison establishes his credentials as a firsthand observer: he attended Masonic lodges across Continental Europe — in France, Germany, Russia, and elsewhere — reached the rank of Scotch Master, and came into possession of secret ritual documents, giving him an insider's vantage point rather than a merely speculative one. His central claim is that Freemasonry, originally a harmless English institution of gentlemanly sociability, was systematically transformed on the Continent — especially in France and Germany — into a network of lodges that sheltered dangerous religious skeptics, political radicals, and "projectors" who used Masonry's secrecy to spread doctrines they could not safely publish openly. He singles out French cultural vanity and missionary zeal as the primary engine of this corruption, arguing that Paris exported an ornate, ideologically charged version of Masonry across Europe while displacing its simple English form. He also implicates the Jesuits, Rosicrucians, mystics, and various fanatics as having infiltrated and weaponized lodge meetings for subversive purposes. The text is aimed at readers who might dismiss Freemasonry as mere social frivolity, and its distinctive move is to argue — from personal experience and German scholarly sources — that Continental lodges had become the incubators of the irreligion and political radicalism Robison associates with the French Revolution.