The boy of Bilson: or, A true discouery of the late notorious impostures of certaine Romish priests in their pretended exorcisme, or expulsion of the Diuell out of a young boy, named William Perry, sonne of Thomas Perry of Bilson, in the county of Stafford, yeoman : Vpon which occasion, hereunto is premitted a briefe theologicall discourse, by way of caution, for the more easie discerning of such Romish spirits; and iudging of their false pretences, both in this and the like practices.