I've never said that I made a conclusion, but simply a theory. And, I find that the "streetcars" are inconclusive. I don't see it. If it is, where are the wheels? They appear to be a part of the building or some other object.
I also notice that there's a triangular shaped hat on the person riding the horse. The GW equestrian statue also has a triangular shaped hat oriented the same way. Comparison images are below.
The other historic individual that comes to mind is Napoleon Bonaparte. He also sported that signature hat of his which had a triangular-like shape. There's one in Cherbourg, France, but that equestrian statue has the horse facing left and not right like in the sketch. The surrounding structures, pedestal, and composition of the area are off, too.