Henry John Stock (1853-1930) Theodor Körner's Harp Signed and dated 79

Henry John Stock (1853-1930) Theodor Körner's Harp Signed and dated 79, also signed, titled and inscribed extensively but indistinctly on a label verso Watercolour heightened with bodycolour 38 x 51cm; 15 x 20in The German Theodor Körner wrote operas, from which this is likely to be a scene and there exists a portrait of him by his aunt Dora Stock. It is unclear whether she is any relation to H. J. Stock.