These cases of possession were in some respects sore snares to the priests of the Church of Rome, who, while they were too sagacious not to be aware that the pretended fits, contortions, strange sounds, and other extravagances, produced as evidence of the demon's influence on the possessed person, were nothing else than marks of imposture by some idle vagabond, were nevertheless often tempted to admit them as real, and take the credit of curing them. The period was one when the Catholic Church had much occasion to rally around her all the respect that remained to her in a schismatic and heretical kingdom; and when her fathers and doctors announced the existence of such a dreadful disease, and of the power of the church's prayers, relics, and ceremonies, to cure it, it was difficult for a priest, supposing him more tender of the interest of his order than that of truth, to avoid such a tempting opportunity as a supposed case of possession offered for displaying the high privilege in which his profession made him a partaker, or to abstain from conniving at the imposture, in order to obtain for his church the credit of expelling the demon. It was hardly to be wondered at, if the ecclesiastic was sometimes induced to aid the fraud of which such motives forbade him to be the detector. At this he might hesitate the less, as he was not obliged to adopt the suspected and degrading course of holding an immediate communication _in limine_ with the impostor, since a hint or two, dropped in the supposed sufferer's presence, might give him the necessary information what was the most exact mode of performing his part, and if the patient was possessed by a devil of any acuteness or dexterity, he wanted no further instruction how to play it. Such combinations were sometimes detected, and brought more discredit on the Church of Rome than was counterbalanced by any which might be more cunningly managed. On this subject the reader may turn to Dr. Harsnett's celebrated book on Popish Impostures, wherein he gives the history of several notorious cases of detected fraud, in which Roman ecclesiastics had not hesitated to mingle themselves. That of Grace Sowerbutts, instructed by a Catholic priest to impeach her grandmother of witchcraft, was a very gross fraud.