The evolution of the southern half of Union Square can be traced through early photographs. Many of the spots mentioned here are relevant to the novel.
A. Union Square Theater
B. Morton House Hotel and the C. Domestic Sewing Building
D. Washington Monument and behind it the E. Monument House
Note that in 1860 there was no park at Union Square. The cross street on the right is 14th Street.
At the corner of 13th Street and University Place is the complex of shop, greenhouses and stalls that make up the Mezzanotte florist operation. The residence beside it can’t be seen in this photo.