http://kcpl.org/localhistory/media.cfm?print=go&mediaID=35167 Local History - Kansas City Public Library ] The area, which became known as the Rockhill District, was noted for its use of limestone in both the houses and in stone walls that stood beside the streets Local History - Kansas City Public Library  Nelson also acquired more than 2400 acres in what is presently Grain Valley, Missouri, for the establishment of Sni A Bar Farm.