If you come to town, let me know. I'll buy first round.
Still, we agree on the which, if not the why. -- "later" meant either "when you walk around the corner" or "oatmeal."[ Parent ]
Trying to use logic, I'd assume you cap city because it comes part of the proper name when used as it was used in Blixco's diary. This is norm for any city, but the construction is usually "the City of San Francisco" or "the City of Akron."[ Parent ]
In other words, the USPS designation of New York simply means that such is the name of the NYC post office. It has no bearing on whether or not NYC has City as part of its name or not.