The novel provides these clues to deciding what were the most likely years during which the action takes place:
The novel provides these clues to deciding what were the most likely years during which the action takes place:
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# The novel depicts the first use of [[Diesel]]-electric [[locomotive]]s in [[railroad]]ing. This is the clue that the International Movie Database mentions.<ref name=imdb/>
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# The novel depicts the first use of [[Diesel]]-electric [[locomotive]]s in [[railroad]]ing. This is the clue that the Internet Movie Database mentions.<ref name=imdb/>
# Railroads are the primary mode of overland transport.
# Railroads are the primary mode of overland transport.
# [[Airline]] service is still a projected service of the novel's future, and [[monoplane]]s are something new.
# [[Airline]] service is still a projected service of the novel's future, and [[monoplane]]s are something new.