Certificate issued by Judge Advocate Gray certifying that Lieutenant Colonel John E. McGowan was in attendance of the General Courts-martial from June 14 to July 26, 1865, in accordance with Special Order No. 127.
Special Order No. 127 was issued by Major General Stoneman convening a court-martial for the trial of Colonel S. R. K. Patton of the 8th Tennessee Cavalry. The order also commands Lieutenant Colonel John E. McGowan to "depart for the court."