Of all the denizens of the circles of Hell, perhaps none is more feared among those of a high-minded sensibility than the succubi. The Assizes of Suffolk in the eighteenth century granted the Office of the Witchfinder General the power to employ 'demonic powers' so long as their use is 'reasonable' and 'made only to defeat some yet greater supernatural threat'. No attempt was made in the wording of the assizes...