In Chapter 7 of Frankenstein, How does the development of the plot, characters, and setting affect the tone in this chapter?

The account of William's death is written in highly disjointed language: the sentences are long, and frequently are interrupted by semicolons, as though each thought is spilling into another. This indicates the magnitude of the distress felt by the narrator's father as he writes. Letters, in general, play a central role in the novel: it begins and ends with a series of letters, and many important details of plot and character are related through them. They enable Shelley (who has, for the most part, committed herself to Victor's first-person narration) to allow the voices of other characters to interrupt and alter Victor's highly subjective account of the novel's events.