Since John ended up in Illinois at least by May of 1865, should I check to see if he was "captured" then paroled at Vicksburg? I have not been able to find anyone in the 21st captured at Vicksburg. I've been looking through the "List of Confederate soldiers who were captured at Vicksburg, Mississippi on 4 July 1863" on Ancestry.com but no luck yet.

Thank you again,
Sharolyn