South Norwalk and Norwalk Conn.
1875
Published by O.H. Bailey & Co.
Boston, Mass.
Source: https://collections.leventhalmap.org/search/commonwealth:wd376366r
If you zoom into the map (use the source link above), you can see that some individual buildings are identified by number in the legend at the bottom.
Note that Flax Hill Rd is called West St until the intersection that is now with Soundview, and after that it's called Old Point Rd.
This is the map from which I took the header image.