So he can investigate who Pearl's father is without suspicion, and so he can properly punish him under the radar.
Roger Chillingworth asks Hester to keep the secret that he is her husband and that he is seeking revenge on the man who had an affair with her.
When Hester meets Roger Chillingworth on the peninsula, she tells him that she is going to make Reverend Dimmesdale aware of Chillingworth's true identity (Roger Prynne - Hester's former husband.)Hester says to Roger Chillingworth "I must reveal the secret. He [Arthur Dimmesdale] must discern thy true character, to discuss this matter with him, told him to be there for that discussion.
Roger Chillingworth, Hester Prynne's husband, was still at home attending to business. He sent Hester ahead to Massachusetts Bay Colony while he continued to take care of the business.
Hester Prynne reveals to Reverend Dimmesdale that Roger Chillingworth is her husband. She discloses their secret marriage and the fact that Chillingworth is seeking revenge on Dimmesdale for his adultery with Hester.
In 'The Scarlet Letter', Hester hopes to save Dimmesdale by telling him the truth about Chillingworth so that they can be together. By learning his identity, they go off to live with Pearl in England.
Roger Chillingworth is physician & Hester Prynne's husband.
Chillingworth's real name is Roger Prynne. In Nathaniel Hawthorne's novel "The Scarlet Letter," he adopts the pseudonym Roger Chillingworth in order to conceal his true identity and exact revenge on Hester Prynne and Arthur Dimmesdale.
Hester tells the true identity of Roger Chilling-worth and the King was amused but said for her to keep living in the kingdom.
The stranger in the crowd, later revealed to be Roger Chillingworth, vows revenge on the father of Hester Prynne's child, whom he believes to be responsible for Hester's shame. He makes it his mission to uncover the identity of the father and seek retribution.
Hester Prynne's husband, Roger Chillingworth, is a physician.
Roger Chillingworth was Hester's husband
Roger Chillingworth approaches Dimmesdale just as he invites Pearl and Hester to join him near the scaffold.