Since William Penn presided over the state's only official witch trial in 1684, witchcraft and folk magic have been a part of the history of the Keystone State. English and German settlers brought their beliefs in magic with them from the Old World--sometimes with dangerous consequences. In 1802, an Allegheny County judge helped an accused witch escape an angry mob. Susan Mummey was not so fortunate. In 1934, she was shot and killed...