See William Roberts, Memories of the War to End War 1914–18 (London, 1974) for an account of life on the front line and the commissioning processes for war artists.
Athletes Exercising in a Gymnasium, The Wedding, The Auction Room and The Cockneys – see 'William Roberts: Catalogue raisonné' available at http://www.englishcubist.co.uk/catchron.html.