I have pondering the 73 State Street theory put forth, and now express serious doubts on that one.
Yes, the vacant lot at the SW corner of State and Myer is approximately where 73 would be. But so is the dark-colored house next to it.
Lots of houses had double-lots back then. Land wasn't at the premium it is now. That was probably the side yard or the garden plot for that adjacent house. Or just a lot being held vacant for future real estate construction by the house next door, or some other person who lives somewhere else. We cannot assume that a house formerly stood on that lot. I think it is more likely that the lot was held by the house next door, for one reason or another.
It was probably the dark-colored house that was demolished in 1941. It's in the aerial photo, therefore 1941 is the upper limit of the photo. The 165 Union Street evidence is interesting, there is a new duplex there now. It replaced a vacant lot and a very small very old red house that was close to the street (167). I heard once that there was previously another small house on that vacant lot, also close to the street. So that would be 165, and BLeafe has identified when it was demolished. So we're looking at mid 1938 as the lower date limit.