Well, it depends on what part you're asking about.
It wasn't until the end of chapter 10 that Chillingworth was completely sure. He had become Dimmesdale doctor because of this, he had access to Dimmesdale and saw things others did not.
However, Dimmesdale did not confess to being the father until Chapter 23.
In "The Scarlet Letter" by Nathaniel Hawthorne, the reader finds out that Reverend Arthur Dimmesdale is the father of Hester Prynne's daughter, Pearl, towards the end of the novel when his guilt becomes overwhelming and he publicly reveals the truth during a moment of confession and redemption.
The father of Hester's baby in "The Scarlet Letter" is Reverend Arthur Dimmesdale.
Arthur Dimmesdale is the father of Hester's baby in The Scarlet Letter. However, this fact is not revealed until later in the story.
Chillingworth discovers Dimmesdale's secret sin when he sees a mark in the shape of an "A" on the sleeping Dimmesdale's chest. This confirms his suspicions that Dimmesdale is the father of Hester Prynne's daughter, Pearl.
Some of the clues that Dimmesdale is Pearl's father include their physical resemblance, Pearl's strong connection and recognition of Dimmesdale, Dimmesdale's guilt and emotional reaction towards Pearl, and hints dropped by other characters such as Hester and Chillingworth. The reveal is confirmed towards the end of the novel by both Hester and Dimmesdale.
Chillingworth discovers a mark on Dimmesdale's chest, leading him to believe that Dimmesdale is hiding a secret sin related to the mark. This discovery fuels Chillingworth's suspicion that Dimmesdale is the father of Hester Prynne's child.
No, Pearl did not want to know her father throughout most of the novel. She represented the consequences of her parents' sin and was often described as wild and uncontrollable. It was only towards the end of the story that she showed interest in her father, Reverend Dimmesdale.
The local pastor and biological father of Pearl.
Chillingworth figures out that Dimmesdale is Pearl's father by observing his deteriorating health and demeanor, as well as the guilt and emotional toll Dimmesdale bears. Chillingworth also observes the deep bond and connection between Dimmesdale and Hester, which leads him to suspect their relationship. Through his manipulation and probing, he eventually confirms his suspicions.
In the novel "The Scarlet Letter" by Nathaniel Hawthorne, Reverend Arthur Dimmesdale is revealed to be the father of Hester Prynne's baby, Pearl. Their affair leads to a significant portion of the story's plot and themes.
Pearl washes off Dimmesdale's kiss in Chapter 19 of Nathaniel Hawthorne's novel "The Scarlet Letter." This moment represents Pearl's rejection of Dimmesdale as her father and her understanding of the shame associated with the sin he carries.
The father of Hester's baby in "The Scarlet Letter" is revealed to be Reverend Arthur Dimmesdale, a respected minister in the Puritan community where Hester lives. The novel explores the consequences of their illicit relationship and the burden of guilt and secrecy that both characters carry.
Chillingworth wants revenge on Dimmesdale and wants to continue tormenting him. He sees Dimmesdale's public confession as a potential end to his suffering and manipulation over him. Chillingworth sees Dimmesdale's confession as a threat to his power and control over the situation.