Harold Forster

Harold Forster was responsible for pre-war Black Magic chocolate illustrations, and the famous 'Keep Mum, She's Not So Dumb' poster. He designed full-colour lithographic posters, and was personally commissioned to do work for the MOI by Edwin Embleton. Information collated from: Anonymous, 'Salute the Soldier Posters "Best Yet"', Advertiser's Weekly, Vol. 123, No. 1,599, January 13 1944, p.53; Anonymous, '"Olga" is Mascot in Anti-Rumour Campaign for Services', Advertiser's Weekly, Vol. 112, No. 1,462, May 29…