From 1890 to 1895 , he was contributing editor of the Frankfurter Zeitung , during which time he wrote an article attacking Kaiser Wilhelm II , and for which he spent nine months in prison .
Eisner studied philosophy , but then became a journalist in Marburg .
From 1890 to 1895 , Eisner was contributing editor of the Frankfurter Zeitung , during which time Eisner wrote an article attacking Kaiser Wilhelm II , and for which Eisner spent nine months in prison .
Eisner studied philosophy , but then became a journalist in Marburg .