Robert,
Thank you for all that information.
I added an entry in Findagrave for Pvt. Henry R. Sharpe:
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=20806908&
I found him in the VA grave locator listed as Sharp, H. R.
The VA grave locator lists CHANCEY, J C, but death date is listed as 5/15/1864. (I wonder if they would correct that?)