Lee,
From the ".pdf" file at http://www.nps.gov/chch/hrs/appendixc.pdf does it make some difference in how the markers are listed? For instance,
Eighty-Second Indiana Infantry Regiment Monument 1898 08776
82nd Indiana Infantry Regiment Marker 1898 08824
82nd Indiana Infantry Regiment Marker 1898 08733
Is a Regiment Monument like a marble or granite marker and a Regiment Marker is a metal tablet?
Jim