So here are the photos from Beacon Hill and the Public Gardens. I ended up lending my flash to a woman and man who were trying to take a photo of the fountain with a camera phone. They were timing it with her exposure and he would just manually fire the flash. I hope they got something usable.
Once I read somewhere, that the street with the cobblestone is the most photographed street in America. I'm not sure if it is true, but I can see why.