UNDER BLADE AND LIGHT: The Showmen, the Hidden Hand, and the Knife Behind the Curtain (1780-1910) Mind is the light of the soul, and by this light the hidden things become visible. - Corpus Hermeticum, after XII This isn't a handbook on card tricks. It's a history of how power learned to use them. Under Blade and Light follows 130 years of collusion between showmen, secret orders, police, colonial officials and "respectable" investigators-a system slowly teaching itself how to charge people for belief, harvest their secrets, and turn every challenge into fuel. Drawing on court records, seized lodge files, colonial reports, trade journals and trial transcripts, the book traces a single line: from Cagliostro swaggering into a Strasbourg lodge in 1780 with forged credentials and real backing, through Masonic networks, spiritualist booms, railway circuits and dealer cartels, to Houdini dying on Halloween with intelligence contacts, missing files and a perfectly convenient legend. The story runs in three movements. First, lodges act as the operating system: membership as currency, secrecy as insurance, ritual as camouflage while states oscillate between tolerating, infiltrating and smashing them. Then railways and dedicated theatres harden everything into industry: colonial governments hire magicians as psychological weapons; American touring circuits professionalise the extraction. Finally the machinery locks: trade journals make and break reputations, dealer houses decide what's possible on stage, "psychical researchers" and occult orders fight public battles that somehow always leave the core networks intact. Inside you'll find: Lodges, occult orders and "investigators" sharing personnel, interests and tactics across supposedly hostile camps Colonial and intelligence services using magicians as controlled agents, then discarding or discrediting them on schedule Trade press and dealer networks quietly overruling venues and audiences, determining who works and who vanishes from the record "Debunking" exposed as a revenue stream and management tool, turning opposition into a crop to be farmed rather than a threat to be crushed This isn't a nostalgic parade of eccentrics. It's a map of a control system learning to hide in plain sight-behind red curtains, Masonic aprons, embossed letterheads and glowing reviews. Once you've followed the knife behind the curtain here, it's very difficult not to notice the same hand at work elsewhere.