Painter, born in London, but studied in Riga, Russia, and in Munich just prior to World War I. Grimm’s Munich studies were at the Knirr Atelier during the Blaue Reiter period, and as a young man he showed in Berlin, Munich and Venice. In 1913 he married another art student, the Russian Masha Oulpe, in 1914 was interned in Ruhleben, but was exchanged in 1916 and returned to England. In 1918 he went back to Russia and was conscripted by the Bolsheviks to paint numerous propaganda posters. By end-year he had escaped from Constadt in a smuggler’s fishing boat to Finland, then to London. Soon after the escape the Crown Princess of Sweden bought works by Grimm from an exhibition of paintings by Ruhleben prisoners and the French painter Henri Matisse, seeing Grimm’s work, praised his gifts and sense of colour.