The attribution was kindly confirmed by Martin Dieterle in a photocertificate dated 7 March 2002. The drawing is dated by Martin Dieterle to 1865-70, and will be included in the catalogue raisonné of Corot's drawings by Jill Newhouse and Martin Dieterle currently in preparation.
Around 1860 Corot began to experiment with a more complex technique to attain new atmospheric effects. He first used soft black chalk stumped heavily on light brown paper, which he would then rub into the paper with cotton wool to obtain a soft effect. After fixing the chalk, he was free to draw over it again. Other drawings in the same technique and of the same period are illustrated in C. Bouret, Corot, le génie du trait, exhib. cat., Paris, Bibliothèque nationale de France, 1996, nos. 158-9 and 168-9. A further two were sold at Christie's New York, 24 January 2001, lot 39 and 23 January 2002, lot 106.