in what ways has rorger chillingworth changed since hester last saw him in chapter 9

Chillingworth becomes much more twisted,old and evil:

"Chillingworth has undergone a profound change since arriving in Boston, going from a genial old man to an ugly and evil person. Thus, "it grew to be a widely diffused opinion that the Reverend Arthur Dimmesdale ... was haunted either by Satan himself, or Satan's emissary, in the guise of old Roger Chillingworth.”