First, minor : g-a-o-l, is the British spelling of the American Jail. Second, Sarah was the daughter of John Warren; her husband, as mentioned, was Robert Prince.
And, as noted, she was not a witch, nor were most of the others accused; in fact, there is some evidence that many people called village witches were so called either to have a reason to let them live on charity, without calling it such, or, conversely, to have an excuse to get revenge on them.
There were, I presume, as often stated, herbalogists who wwere either accepted or feared, depending; and superstition did ply a part.