Following continual police harassment, P-Orridge and Tutti relocated to London, moving into a squat and obtaining a basement studio in Hackney which they named the "Death Factory". After a brief correspondence, P-Orridge met American novelist and poet William S. Burroughs. Brion Gysin would become a major influence upon P-Orridge's ideas and works and was the latter's primary tutor in spiritual magic. 1973 saw COUM take part in the "Fluxshoe" retrospective that toured Britain exhibiting the work of the Fluxus artists; it was organised by David Mayor, who befriended P-Orridge. At that year's Edinburgh Festival, P-Orridge undertook a Marcel Duchamp-inspired performance art piece, "Art Vandals", at the Richard Demarco Gallery, engaging guests in unconventional conversation, and spilling their food and drink on the floor. Exhibiting alongside the Viennese Actionists, P-Orridge came under increasing influence from these Austrian performance artists, adopting their emphasis on using shock tactics to combat conventional morality. P-Orrdige's first film, "Wundatrek Tours", was released in September 1973, and documented a day out to Brighton. Throughout the year the artist sent personally designed postcards to mail-art shows across the world.