We've talked about this passage as being Gothic Romantic—but what does that mean?
Romance, in the 19th Century sense, was less about love and relationships, and more about intense emotions generally. (A lot of Romantic paintings were of wild landscapes that evoked strong emotions.)
Gothic was a subset of Romance, particularly focused on feelings of dread and despair (and all the things that cause them, including death, disease, decay, existential crises, and too much mist).