What do they and others mention as signs of witchcraft

Signs of witchcraft could be anything from salt circles to pentagrams and pentacles. When it comes to signs of witchcraft listen to your gut. If something feels bad leave, if you feel like you shouldn't touch something don't touch it.

Puritans in Salem look for all kinds of "clues" for witchcraft. People are supposed to know their commandments of the Bible. People found reading books other than the Bible were condemned. People worshiping any "false" idols were witches. Mumbling was looked down on. Of course, once the hysteria takes hold, most any accusation against someone could be construed as witch related.