© Licensed to London News Pictures. 20/02/2019. LONDON, UK. A staff member views "Mädchen auf dem Diwan (Girl on a Divan"), 1906, by Ernst Ludwig Kirchner (Est. £2.8-3.8m). Preview of Sotheby's Impressionist & Modern and Surrealist Art sales.  The auction will take place at Sotheby's New Bond Street on 26 February 2019.  Photo credit: Stephen Chung/LNP