Fig.a. Head of a Horse, Drawn with a Black Crayon. Cavern of Altamira (Spain). First Phase, 1/4. After Breuil.
Fig.b. Bison from the Cavern of Altamira (Spain), Painted in Polychrome. Fourth Phase. After Breuil, C. r., Congr. intern, d'anthr. et d'arch. préhs., 1, p. 384, Monaco, 1906.