Leslie’s secret weapon here was a notorious fence of stolen goods, the Prussian-born Fredericka Mandelbaum, widely known as Marm.

In short, he robbed the banks of nineteenth-century America by making copies of them, declaring replicant architectural warfare on the moneyed classes of the East Coast.

Burglary is the original sin of the metropolis. Indeed, you cannot tell the story of buildings without telling the story of the people who want to break into them: burglars are a necessary part of the tale, a deviant counternarrative as old as the built environment itself.

George Leonidas Leslie, the greatest burglar of the nineteenth century, poses a fundamental, perhaps existential, threat to the urban social contract. He implies that none of us understand how buildings really work—how the city operates—and, worse, that someone else out there has a better idea and is fully prepared to use that knowledge against us.