Final answer:
The lines in question convey a sense of loss and neglect following the gold rush, but also possess an underlying hope for future redemption and positive change.
Step-by-step explanation:
The lines provided from the queries appear to reflect a sense of nostalgia and melancholy concerning the events following the gold rush. There is a lamentation over the abandonment and neglect that ensued once the fervor of the gold rush subsided. Specifically, the poem speaks of Yuba City as a precious jewel that has been left to face 'fortunes cold and cruel,' suggesting a sense of loss for the bustling activity that once defined the area. However, there is also a hopeful undertone where the author illustrates a belief that there will be redemption and positive change in the future, signifying resilience and optimism despite the initial hardships faced after the gold rush.
Furthermore, the varied excerpts present glimpses into the lives affected by the gold rush era, expressing the various outcomes—both promising and disheartening—that came from this period of intense change and hope. These reflect broader themes of ambition, disappointment, love, solidarity, and the relentless passage of time, all of which are hallmarks of the human condition during periods of great societal shifts like the gold rush.