Hostilities recommenced on 17 August 1813; Körner spent the night of 25 August at Gottesgabe manor, where he played the piano and sang.
According to J.R. Miller in "Homemaking" (now published as "The Family"), Körner had a very close friendship with his sister Emma, and when he died, "she survived him only long enough to complete his portrait and to draw with the pencil of love a sketch of his last resting-place."