Perhaps there are at least two (competing) systems running in parallel. 1313 East 60th Street is Chapin Hall at University of Chicago. From a geographic standpoint, its located on an island ("Blue Island" if I recall correctly).
Attachment 3150
In the map, 1313 East 60th Street is just south of where it reads "HYDE PARK". With river to the north and to the south, that and the Chicago Loop along with the CBOT are located on an island. The little white band (road) south of where it reads "NEAR NORTH SIDE" hides the length of river that runs east and west into Lake Michigan.
Didn't OBAMA and ROBERTS fudge the U.S. presidential oath?
I meant to add that: the Kingdom of David might be best comprehended in light of the Tabernacle of David.In my pondering this arises as very important when understanding exactly what the Kingdom of David was. In the Jewish mind, Israel had been under conquest since about 522 BC. - When the Jews of Babylon conquered the Temple Mount as found in Nehemiah Chapter 10. This is when they read the Laws of Moses aloud and adopted signed curse - oaths of office by Constitution.