Luderitz, Gustav Karl Friedrich (1803-84). Medium: gouache on paper. Date: 1822. Russian novelist and mystic; left her husband in 1801 for pleasures of literary and social life in Paris and Switzerland; wrote Valerie in 1804, largely autobiographical novel; converted to Moravian pietism; Provenance: Private Collection / Giraudon. Photographic rights held by The Bridgeman Art Library.