Final answer:
The provided excerpts do not contain information about Dicey's mood change after leaving New York; thus, an accurate answer cannot be given without further context.
Step-by-step explanation:
Based on the given excerpts, none provide explicit information about Dicey's mood change once the bus left New York; therefore, without additional context, it would be inappropriate to speculate or provide an inaccurate response.
The texts provided do discuss various characters' emotional states and anxiety in anticipation of changes or actions they are facing, but none address Dicey's situation specifically.
Relevance to the character Dicey or the specific context from which this question may have arisen is not found in the excerpts.