Frederik Marinus Kruseman – private collection. Title: Winter Landscape with Strollers and Skaters. Date: 1840. Materials: oil on canvas. Dimensions: 58.5 x 76.5 cm. Inscriptions: FM Kruseman fc 1840 (lower right). Sold by Sotheby’s in London, on November 20, 2012. Source: http://www.sothebys.com/content/dam/stb/lots/L12/L12102/251L12102_6MJGJ.jpg. I have changed the light and contrast of the original photo.