HEINRICH SIEGFRIED (1814 Zurich 1889) Zürich von der Waid. (Zurich seen from the Waid) Circa 1875. Aquatint etching, coloured and heightened with white. The framing line in brush and black ink, the margins in black-grey gouache. Titled on the lower margin in the centre in pen and gold ink: Zürich. 39 x 59 cm. Gold painted frame. Provenance: - Galerie Kempf, Zurich. - Private collection, Switzerland.