Almost at the moment when Mr. Gatsby identified himself, a butler hurried toward him with the information that Chicago was calling him on the wire. He excused himself with a small bow that included each of us in turn.
Gatsby is constantly being called away by phone calls from other cities. These phone calls might seem innocuous, but are significant in at least two ways.
One, they are sketchy, suggesting that Gatsby’s business associates must not be named, so instead the butler says “Chicago is calling.”
Two, they are evidence that Gatsby actually works for a living. This differentiates him from the leisurely aristocracy — exemplified by Tom and Daisy.
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