Nice job Ellen. I did the same thing for the 12th ward, but I mapped it, instead, on Google Maps which, unfortunately, remains unsearchable and therefore unavailable to the public.

While going through the 12th, I found a portion of the 11th incorporated which Family Search made note of in their Research Wiki [ https://wiki.familysearch.org/en/index.php?title=New_York_18... ]. Unfortunately I doubt that someone manually searching the 11th for ancestors in that stray part of the 11th will ever see that note. I wish FS would reflect that anomaly, instead, as a note appended to the 11th's listing in the 1865 NY State index. Ah well.

Perhaps you might, somehow, get your 20th info linked within the FS 1865 New York State wiki...maybe as a link in "Sources of Information for This Collection"? Your effort should be widely shared for this thus far unindexed collection.