In "The Bride Comes to Yellow Sky" what are some examples of symbolism?

One of the central concerns of this excellent short story
is the way in which characters are shown to be either insiders or outsiders and how such
discrete categories can at times overlap. We are presented with a newly-married couple,
who are obviously unsure about their status and how they fit in. In particular, as they
are on the train, the married couple believe that the opulent and grand surroundings on
the train mirror the "glory of their marriage." However, note how the black porter
responds to this and how he treats them:

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...the man's face in particular beamed with an
elation that made him appear ridiculous to the black porter. This individual at times
surveyed them from afar with an amused and superior grin. On other occasions he bullied
them with a skill in ways that did not make it exactly plain to them that they were
being bullied. He subtlyused all the manners of the most unconquerable kind of snobbery.
He oppressed them; but of this oppression they had small knowledge, and they speedily
forgot that infrequently a number of travellers covered them with stares of derisive
enjoyment.

The black porter
is thus a symbol of a social outsider, but who is able to take advantages of the
insecurities of the married couple to act as an insider for one moment due to the change
of status of the married couple and the way in which they are unsure of themselves and
their social status. It would be an interesting exercise for you to look at the
characters symbolically and see how they relate to these two categories of outsider and
insider to analyse what such labels suggest about the characters and the larger symbolic
significance of belonging to the society that this story presents us
with.