Final answer:
The "new horror" in question refers to a literary concept where a character experiences an increased level of fear or torment, typically associated with psychological or supernatural elements. While the specific incident concerning Dimmesdale is not detailed, it generally indicates a significant and disturbing shift in a character's emotional or mental state.
Step-by-step explanation:
The "new horror" that occurs to Dimmesdale, a character from Nathaniel Hawthorne's The Scarlet Letter, is not explicitly described in the texts provided.
However, the concept of a "new horror" within a narrative often alludes to a fresh psychological or supernatural terror that a character confronts, leading to a higher level of fear or torment.
The notion seems to be aligned with a sudden realization, a dramatic change in perception, or an encounter with an unsettling truth that shakes the character's foundations, much like the various excerpts depict characters grappling with internal demons, moral dilemmas, or ghostly presences that evoke deep-seated fear.
Taking into account the general context of horror in literature and how it can manifest as a turning point for a character, Dimmesdale's "new horror" could be intimated to be an intensification of his inner torment and guilt over his sins, a chilling epiphany, or perhaps even a supernatural occurrence that further complicates his troubled existence.