File:Pablo Picasso, 1907-08, Two Trees (Les Arbres), watercolor on paper, 47.9 x 62.7 cm, Philadelphia Museum of Art.jpg

Published 1914
[http://www.unz.org/Pub/Century-1914apr-00851?View=Search&SearchView=PDFHits&pages=852 Walter Pach, The Transitional Age in Art, IV. The Point of View of the "Moderns", The Century Magazine, April 1914, p. 866]