Owing to the proximity of the Hay Market, the number of establishments of bad character, the preponderance of the trading and working class population crowded in these streets and alleys in the heart of Petersburg, types so various were to be seen in the streets that no figure, however queer, would have caused surprise.
There are no more uses of "proximity" in the book.
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They selected the offices for their proximity to D.C. political power.
We like the neighborhood because of its proximity to the University.