Calpurnia's cot shows how segregation is everywhere in Maycomb, including the Finch home.
We know that Aunt Alexandra has somewhere to sleep when she stays with them, suggesting that they have a spare bedroom. However, when Calpurnia stays with the Finches, she is not allowed to stay in the spare room.
he lived in cuba for a time and fished there himself
The American dream is basically to have a good life. To have a house, a car, and a family. However overtime things have changed. The American dream these days can be seen as a house, a car, a pool, a boat, big tv’s, and basically any other accessories or expensive toys.