Materials: oil on paper laid down on canvas laid down on masonite. Dimensions: 50.8 x 75.6 cm. Inscriptions: ABierstadt (lower left). Sold by Christie’s in New York, on May 30, 2009. Source: http://4.bp.blogspot.com/-XLnA1V_1ckI/Urqw3U5sSjI/AAAAAAAAqrc/voRmmEyuwaw/s1600/paisajes-clasicos-al-oleo+(3).jpg. I have changed the light and contrast of the original photo.
Albert Bierstadt – private collection. Title: A River Landscape, Westphalia. Date: 1855. Materials: oil on canvas. Dimensions: 109.9 x 149.9 cm. Inscriptions: A. Bierstadt/1855 (lower right). Sold by Christie’s in New York, on December 4, 2008. Source: https://commons.wikimedia.org/wiki/File:Bierstadt_Albert_Westphalia.jpg. I have changed the light and contrast of the original photo.