19th and early 20th-century hair appears to be everywhere when you start to look, from the abundant locks of the pre-Raphaelites to the myriad objects on show at the Great Exhibitions. The latter, hosted at venues such as the Crystal Palace, hinted at the level of global trade in hair economies, from hair harvest, hairpieces, and hairwork to commodities for styling and adornment. It was a period when hair became fetishized in all sorts of ways, from fashioning hair to moralising constriction, from suggestions of sexuality in abundant free-flowing locks, to intricate hair-incorporating...