http://www.macdougallauction.com/indexx0619.asp?id=38&lx=a
*38. ROERICH, NICHOLAS (1874–1947)
Blue Cliff, signed with a monogram.
Pencil and tempera on paper, 25 by 33 cm.
20,000–30,000 GBP
Executed in the second half of 1920s–1930s.
Provenance: Private collection, Europe.
Authenticity of the work has been confirmed by the expert O. Glebova.
Authenticity has also been confirmed by the expert V. Rosov.