In the streets of New York, we try to imagine the city as Walt Whitman, and other artists of his time, experienced it. — [Editor’s Note: Over the course of 2022 and 2023, New American History Executive Director Ed Ayers is visiting places where significant history happened, and exploring what has happened to that history since. He is focusing on the decades between 1800 and 1860, filing dispatches about the stories being told at…