When Suzy Bannion (Jessica Harper) stumbles down a hallway in Dario Argento’s Suspiria (1977), we sense that the crimson flocked wallpaper is participating in a spell. In a blinding white flash punctuated in Goblin’s score by the word “witch,” a shard of mirror illuminates the dust that permeates the space with cognitive and respiratory menace. Suzy runs her hand along the flocked damask and clutches her chest as she struggles to breathe. In that moment, Argento’s Suspiria not only connects wallpaper to witchcraft, but also evokes, intentionally or not, the real-world pulmonary illnesses of wallpaper factory workers asphyxiated by flocking dust.[i] On screen and off, the allure of wallpaper has always been countered by disquieting side-effects. The bright colors of nineteenth-century wallpapers were made possible by arsenic, known to seep from the walls in damp weather and infuse a room with dangerous fumes. Nineteenth- and twentieth-century advice writers saw in wallpaper opportunities for the aesthetic and moral enrichment of the working class, even while fearing that the sensual impact of the wrong wallpaper might lead astray the sensitive soul. Oscar Wilde once remarked, “Why, I have seen a wallpaper which must lead a boy brought up under its influence to a career of crime”—a joke, perhaps, but one taken seriously by moralists, home decor treatises, and horror films.[ii]