Okay, but Wichita is south of the Kaw. The Kaw runs east-west. Wichita is in the county next to the “s” in “Arkansas” (Arkansas River) on this map:
http://en.wikipedia.org/wiki/Kansas_River#mediaviewer/File:Kansasrivermap.png
Isn’t that way down south of the Kaw?
It loops around in Kansas City and forms part of the Missouri western border, so basically what the saying means, I heard it from another lawyer older than I am, is there is no law west of the Missouri border