File:Fernand Léger, 1910, Nudes in the forest (Nus dans la forêt), oil on canvas, 120 x 170 cm, Kröller-Müller Museum.jpg

Published in 1920
[https://archive.org/stream/derwegzumkubismu00kahnuoft#page/n125/mode/2up Daniel-Henry Kahnweiler, Der Weg zum Kubismus, published 1920 by Delphin in München. Written in German. Cit. n. 30.] Dated 1910.