Kat Typer I know is fascinated by the pseudoscientific spiritualism of the Nineteenth Century: meters to quantify ghostly presences, meticulously catalogued séances, ESP research, but it is not in the supernatural where Kat finds wonder. It is the late Nineteenth-Century mind that fascinates, these scientists who were simultaneously so rigorous and so poetic, so critical and so credulous, so expert and so wrong. It was a unique mind-state, Kat thinks, fleeting, a psychological mayfly possible only in the moment when science was rising quickly in respect and use, but lagging behind in power.