William H. Thomas
Illinois Civil War Muster and Descriptive Rolls Database (Illinois State Archives):
       
American Civil War Soldiers (ancestry.com)
         William Thomas - Pvt - Co I - 18 Illinois Infantry
Civil War Soldiers & Sailors System Search Detail (National Park Service):
         William Thomas - Co I - 18 Illinois Infantry
          Soldier's rank in - Pvt
          Soldier's rank out - Pvt
          Film Number M539, Roll 90
Civil War Pension Index (ancestry.com):
      Thomas, William H.
      Service - I - 18 Ill Inf.
       Date of filing - 1889May17 - Invalid; Appl #104664; Ill.
National Graves Registration Database (Sons of Union Veterans of the Civil War):
      Thomas, William H. 18 Illinois Infantry
       Died, 15Apr1891; Buried, Oakwood, [Joliet] Will County, IL
Will County Illinois USGenWeb Necrologist Reports (© 2002 The ILGenWeb Project All Rights Reserved):

Headstone Reading,

Published Obituaries:

Additional Biographical Material: