So far, just this reference:(It's a page about the Lincoln Highway in Iowa)

All of the Directors warmly thank Paul Walker for setting up the meeting in a great room in the beautiful Marshall County Courthouse, and more especially for arranging a memorable reminiscence and lunch at historic Stone's Restaurant, since 1881 "under the viaduct, down by the Vinegar Works."

from: http://www.ia.net/~iowalha/newsletters/983/983.html