The second incident, which occurs later the same evening, is when Millie tells Montag that the Mc Clellans have moved away because Clarisse died in an automobile accident — she was "run over by a car." If the Hound and Captain Beatty are a gauge of Montag's growing "disease" (Bradbury's word), the news of Clarisse's death, coupled with a fire call to the unidentified woman's house, brings about his conversion.
The matter of the overdose — whether an attempted suicide or a result of sheer mindlessness — is never settled.
Although Montag wishes to discuss the matter of the overdose, Millie does not, and their inability to agree on even this matter suggests the profound estrangement that exists between them.
As a fireman, Guy Montag is responsible for destroying not only the books he finds, but also the homes in which he finds them.
Books are not to be read; they are to be destroyed without question.
When Montag meets Clarisse Mc Clellan, his new vivacious teenage neighbor, he begins to question whether he really is happy.
Clarisse gives Montag enlightenment; she questions him not only about his own personal happiness but also about his occupation and about the fact that he knows little truth about history.He also fears that the Hound somehow knows that he's confiscated some books during one of his raids.The fire chief, Captain Beatty also senses Montag's unhappiness.The Mechanical Hound is best described as a device of terror, a machine that is perversely similar to a trained killer dog but has been improved by refined technology, which allows it to inexorably track down and capture criminals by stunning them with a tranquilizer.Montag fears that the dog can sense his growing unhappiness.After several more days of encountering Clarisse and working at the firehouse, Montag experiences two things that make him realize that he must convert his life.The first incident is one in which he is called to an unidentified woman's house to destroy her books.Nor did Montag know that people could actually talk to one another; the governmental use of parlor walls has eliminated the need for casual conversation.Clarisse arouses Montag's curiosity and begins to help him discover that real happiness has been missing from his life for quite some time.Fearing for her own safety, Millie declares that she is innocent of any wrongdoing, and she says that Montag must leave her alone.After this confrontation with Millie, Montag entertains the idea of quitting his job, but instead, he decides to feign illness and goes to bed.