Final answer:
The comparison of Mr. Mead's walks to a graveyard symbolizes solitude and separation from life, highlighting the characters' internal struggles as witnessed in various pieces of literature.
Step-by-step explanation:
The comparison to walking in a graveyard reflects the isolation and abandonment the narrator experiences in the described scenes. These passages come from various works of literature where the characters grapple with isolation, disillusionment, and a sense of being cut off from the familiar and communal aspects of life, similar to how one might feel surrounded by the silence and stillness of a graveyard. The mentioned works, by Nathaniel Hawthorne, Robert Frost, and others, use this motif to emphasize their themes of loneliness and the protagonist's internal struggle.