While it was difficult to determine the Madison-era location for many of the architectural fragments, a few fragments, such as the short reused piece of chair rail, had never been cut down and so the job was much easier.  Since the full length of the fragment was known, all of the locations that were either too long or too short to hold the fragment were quickly dismissed.  Additionally, one end of the fragment had a mitered corner.  This piece of evidence told the Restoration Team that the fragment had originally been installed on a salient, or protruding, corner.  This fact allowed the Team to narrow the possible rooms down to one; the ca. 1797 North Passage.  The fragment was found to fit perfectly on a projecting corner in the room and further inspection revealed that the fragment's ca. 1797 nail holes prefectly matched nail holes on a surviving ca. 1797 corner bead.  Based on this evidence there was no doubt that the chair rail fragment was originally installed in the North Passage.