What things does danforth learn about Abigail that make him begin to doubt her character?

Danforth first learns that Abigail lied about seeing Mary Warren drink blood from a cup with Mercy Lewis. After this, he discovers that Abigail had dismissed Mary Warren, accusing her of being sent to spy on her, and Mary had been left alone with the girls who had been dismissed due to being "afflicted." Danforth also learns that Abigail had been seen dancing in the woods with Tituba and the other girls, in what may have been a pagan ritual, and that she was the first to accuse Goody Proctor of witchcraft, as she has a grudge against her for firing her.