sentences:  Tonks went to Archangel in Russia in 1919 as a war artist with a British expeditionary force.He succeeded Frederick Brown as Slade Professor of Fine Art from 1918 to 1930, although he initially turned down the appointment in favour of Walter Sickert, only taking it up when Sickert declined the position.Further post-war students included Thomas Monnington, William Coldstream, Helen Lessore and Philip Evergood.