In "The Invisible Man" by H. G. Wells, the character displays a persistent sense of irritation that deeply affects his demeanor. This chronic annoyance suggests he is troubled by something significant, though the specifics remain unclear. His resulting behavior includes a tendency to engage in low-voiced conversations with himself, indicating a possible descent into isolation or madness.
Mrs. Hall, observing him closely, tries to understand his ramblings but finds herself perplexed...