© Licensed to London News Pictures. 23/03/2018. LONDON, UK. A staff member views "Douala Tonight", 2014, by Boris Nzebo (Est. GBP6,000-9,000).  Preview of Modern and Contemporary African Art sale at Sotheby's, New Bond Street.  The auction will take place on 28 March 2018.   Photo credit: Stephen Chung/LNP