拍品专文
Johan Conrad Gregel was Chief Forester and Gamekeeper of the Imperial High Principality of Bamberg under the control from 1693 to 1729 of Lothar Franz von Schönborn-Buchheim (1655 -1729), the Archbishop-Elector of Mainz from 1694 to 1729 and the Bishop of Bamberg, followed by Friedrich Karl von Schönborn (or Friedrich Carl, 1674-1746) Prince-Bishop of Würzburg and Prince-Bishop of Bamberg from 1729 to 1746.