Cornell University has put the entire 60 volumes of "The War of the
Rebellion" on the Internet. It includes scanned images of reports,
correspondence, seizures of Southern property, etc. sent to the War Dept.
during the Civil War. It includes both Union and Confederate accounts. It
is in chronological order but there is no online index. Many libraries
have the index. Find the volume and page number for your subject in the
index at the library.
http://moa.cit.cornell.edu/MOA/MOA-JOURNALS2/WARO.html