tfa> The streets of New York were famously the filthiest in the United States, too, lined with privies piled high, which overflowed into the streets. Loose pigs and dogs snuffled in the mire.
One of my visceral touchstones for early New York: All through the winter, excrement would accumulate, frozen in the streets. Then would come the spring thaw. Even New Yorkers found it notable. It would take several weeks, for hordes of ultimately-fat pigs, to consume that... bounty.
More on topic, I was years ago viscerally struck by a letter from a 1700's British officer embedded with an American militia. He was clearly gobsmacked - the American officer was... was talking with his men, and... asking the men what they thought!?!
Perhaps we might teach history as a "travel guide for the time traveler"? "Finding yourself in NY in December of 1836, ..."
Nice thought on user interviews.