In the book "The Lighthouse Mystery" by Gertrude Chandler Warner, the characters face a challenging situation, finding themselves drenched from the rain. Despite their predicament, they remain hopeful as they spot the Coast Guard approaching. This moment highlights their resilience and the support they’re about to receive.

The impending arrival of the Coast Guard symbolizes safety and assistance, emphasizing the theme of camaraderie in tough times. The characters' wet condition serves as a metaphor for their struggles, yet their ability to notice help brings a sense of optimism to the narrative.