King James in his Demonology saith, it is a certaine rule, for (saith he) Witches deny their baptisme when they Covenant with the Devill, water being… - Matthew Hopkins

From whence then proceeded this his skill? was it from his profound learning, or from much reading of learned Authors concerning that subject?
Answ. From neither of both, but from experience, which though it be meanly esteemed of, yet the surest and safest way to judge by.

I pray where was this experience gained? and why gained by him and not by others?
Answ. The Discoverer never travelled far for it, but in March 1644 he had some seven or eight of that horrible sect of Witches living in the Towne where he lived, a Towne in Essex called Maningtree, with divers other adjacent Witches of other towns, who every six weeks in the night (being alwayes on the Friday night) had their meeting close by his house and had their severall solemne sacrifices there offered to the Devill, one of which this discoverer heard speaking to her Imps one night, and bid them goe to another Witch, who was thereupon apprehended, and searched, by women who had for many yeares knowne the Devills marks, and found to have three teats about her, which honest women have not: so upon command from the Justice they were to keep her from sleep two or three nights, expecting in that time to see her familiars, which the fourth night she called in by their severall names, and told them what shapes, a quarter of an houre before they came in, there being ten of us in the roome.

That he must needs be the greatest Witch, Sorcerer, and Wizzard himselfe, else hee could not doe it.
Answ. If Satans kingdome be divided against it selfe, how shall it stand?