While I was taking this photo, a woman who looked like she could have been a long-time neighborhood resident, said to me that Boulton & Watt was a bar that had been at that corner a long time ago. But that seems not to be the case. The artificial aging of the brick and the artistic creation of the faded name on the wall apparently convinced her.
Unless the sunlight catches them just right they are invisible from the ground. They zig-zag along the tops of the light poles on either side of Avenue A. It looks like mono filament to me. What possible use can they have? At points, like in this photo, the zig-zag is continued by thicker, more apparent rope. Neither would be capable of carrying electric current, and the mono-filament would not be strong enough to act as a guy wire. It’s a mystery.