Studied art in London and Munich. Illustrated a definite edition of works by the novelist John Galsworthy, his uncle, whom he also drew in 1927. Showed at RA, RI, the Pastel Society and in the provinces; in Paris at the Salon where he gained an Honorary Mention. Had one man shows in London and New York. National Portrait Gallery, Royal West of England Academy and Ferens Art Gallery, Hull hold examples of his work. (see
https://artuk.org/discover/artists/sauter-rudolf-helmut-18951977' class='link'>Art UK).
Imperial War Museum hold five letters (18pp) written to his wife between August 1918 and 1919 while he was an internee in Alexandra Palace camp, north London, and Frith Hill camp at Frimley, Surrey, describing (in rather flowery language) his accommodation in the camps, his fellow internees, their reactions to news of the Armistice in November 1918 and prospective return to Germany, and his own thoughts on the war and on the separation from his family (Rudolf Sauter was a nephew of the novelist John Galsworthy, and a writer and artist of some repute).