In Chapter 2, Mr. Utterson decides to search for Mr. Hyde, and the mood, for the most part, is dark, sinister and foreboding. For example, Mr. Utterson has a nightmare in which Mr. Hyde glides "stealthily through sleeping houses ... [and] through wider labyrinths of lamplighted city," at every corner "crush[ing] a child and leav[ing] her screaming." This nightmare creates a dark and sinister mood, and it ominously forebodes the meeting between Mr. Hyde and Mr. Utterson later in the chapter. When the two do meet, Mr. Hyde is described as "hissing" and "snarl[ing]." His words are abrupt and his manner is defiant, and after the meeting, Mr. Utterson feels "a shudder in his blood" and "a nausea and distaste of life." In this way, this chapter helps to create an impression of Mr. Hyde as monstrous and evil, and the mood is, accordingly, dark, sinister and foreboding.
In Chapter 3, Mr. Utterson talks with Dr. Jekyll, and the mood seems conspicuously, and perhaps unnervingly, calm. Dr. Jekyll assures his friend that he has nothing to fear as regards Mr. Hyde. Dr. Jekyll is described throughout the meeting as having "every mark of capacity and kindness." He earnestly thanks Mr. Utterson for his concern, but calmly dismisses it as unnecessary. From Dr. Jekyll's appearance and manner, the reader might assume that he is in no danger, and that Mr. Hyde, despite our initial impressions, poses no threat. However, Dr. Jekyll's ostensibly calm demeanor is undermined by a very telling moment. When Mr. Utterson first mentions Mr. Hyde's name, Dr. Jekyll becomes "pale to the very lips, and there [comes] a blackness about his eyes." This brief reaction suggests that the apparently calm mood is in fact simply a facade. The mood thus becomes ominous once again.