Final answer:
Hawthorne's clear descriptions are based on his personal experiences and keen observation skills, paralleling the Dickensian style of rich, detailed narrative.
Step-by-step explanation:
Hawthorne can describe the Customhouse and its clientele so clearly because he relied on his personal experiences and surroundings to depict the settings in his narratives. The vividness can be ascribed to his observation skills and ability to weave in intricate detail and nuanced characterizations drawn from real life, similar to the Dickensian style. This technique provides rich, imaginative passages that resonate with authenticity and bring the literary world to life for readers.