Biography
Sidney Chamberlain appears in the official civilian-prisoner return prepared by Saint Louis provost-marshal George E. Leighton on March 3, 1862. The report expressly distinguishes these detainees from prisoners of war and states that they were confined in the Saint Louis Military Prison. The listed charge was aiding and abetting enemy. This records the military authorities' allegation, rather than a finding of guilt. The return covers arrests and discharges during 1861–1862. Source: The War of the Rebellion: Official Records, series II, volume II, section 1, printed pages 249–252, individual entry on page 250, https://archive.org/details/cu31924079570242/page/n265/mode/2up. Verified roster dates: arrested 1861-09-25, discharged 1861-09-27.
Case
Saint Louis Military Prison