>The fact is that Gary doesn't know much about the history of the map or the city, and thought that he would be clever and fluff up his page with a fact or two - but he got it wrong, and wasn't able to tell that it was wrong. He should stick to what he knows and check his fact better.<
You're correct; compared to other things I have been working on, the Washington Map is relatively a new area of research for me, and so there are bound to be a few mistakes. My work on this is still in the early stages.
However, I hope I have presented enough connections here for others to look into and follow-up on and that was my intention.
Despite your attention on the accuracy of some of the details - and I would expect this - for me, what we see here in the overall picture stands, and its obvious to me that many of the elements and themes I have been following in the other fields of research I have been working on, are illustrated in the map of washington - as they are in a few other cities I could mention.