Erhardt Walter
Illinois Civil War Muster and Descriptive Rolls Database (Illinois State Archives):
       Walter, Erhardt - Pvt - Co E - 64 IL US INF
        Residence, Colchester, McDonough Co, IL; Join, 22Dec1861- Joliet;
                         Age, 34; Born, Baden, Baden, Germany
       Height, 5' 7"; Hair, light; Eyes, gray; complexion, fair; Miner
       Walter, Erhardt - Pvt - Co E - 64 IL US INF
       Residence, Joliet, Will Co, IL; Join, 31Dec1863-Pulaski,TN; Age, 36; Born, Baden, Germany
       Height, 5' 7"; Hair, brown; Eyes, gray; complexion, light; Miner
       Mustered out, 11Jul1865
       Veteran absent on Detached Service [military service away from one's assigned organization]
American Civil War Soldiers (ancestry.com)
      
Civil War Soldiers & Sailors System Search Detail (National Park Service):

National Graves Registration Database (Sons of Union Veterans of the Civil War):
      
Will County Illinois USGenWeb Necrologist Reports (© 2002 The ILGenWeb Project All Rights Reserved):

Headstone Reading,

Published Obituaries:

Additional Biographical Material:

US Census Records:
     1870 - Chalmers, McDonough County, IL - Erhard Walter Household:
         Walter, Erhard, 43, b.- Germany, labourer; Lucinda, 56