work. Being a subtle art connoisseur and deep philosopher, she knew well the scientific problems of the institute, and often directed the researches as experienced scientist. The main task of Roerich's activity was in studying the ancient philosophic thought of the East.<ref><ya-tr-span data-index="226-0" data-value="Museum named after N.K. Roerich. " data-translation="музей имени Н.К. Рериха. " data-type="trSpan">музей имени Н.К. Рериха. </ya-tr-span><ya-tr-span data-index="226-1" data-value="Museum guide. " data-translation="Музей гид. " data-type="trSpan">Музей гид. </ya-tr-span><ya-tr-span data-index="226-2" data-value="— Moscow, International Centre of the Roerichs, Master-Bank, 2006. " data-translation="- Москва, Международный Центр Рерихов, Мастер-банк, 2006. " data-type="trSpan">- Москва, Международный Центр Рерихов, Мастер-банк, 2006. </ya-tr-span><ya-tr-span data-index="226-3" data-value="— P.283." data-translation="- P. 283." data-type="trSpan">- P. 283.</ya-tr-span></ref> Roerich had dreamed that sometime a city of knowledge would rise in Kullu valley, which would become an international scientific centre. Later "Urusvati" became a large international institute that united well-known scientists from many countries. J. Bose, R. Tagore, A. Einstein, R. Millikan, L. de Broglie, R. Magoffin, S. Gedin, S.I. Metalnikov, N.I. Vavilov et al. had collaborated with it. In Kullu, Roerich continued her work on Living Ethics, the main work of her life. In 1929, her work "Cryptograms of the East" ("On Eastern Crossroads") was published in Paris in Russian under the pen name Josephine Saint-Hilaire. This work contains apocryphal legends and parables from the lives of great devotees and teachers of mankind: Buddha, Christ, Apollonius of Tiana, Akbar the Great, St. Sergius of Radonezh. Roerich devoted a special essay "The Banner of St. Sergius of Radonezh" to an image of the Savior and Defender of Russian land. In this essay she joined knowledge of history and theology with deep and reverent love to the hermit. is essay was included in the book "Banner of St. Sergius of Radonezh", published under the pen name N. Yarovskaya in 1934. Later life In the first half of the 1930s, Roerich translated from English to Russian two volumes of H.P. Blavatsky's fundamental work The Secret Doctrine. A special place in Roerich's creativity belongs to her epistolary heritage. She corresponded with more than 140 persons. The letters' geography involves several continents. Among Roerich's correspondents were friends, followers, cultural workers and political figures. In her letters, Roerich answered numerous questions, explained the most complex philosophical and scientific problems, and the foundations of the Living Ethics. She wrote about the great Laws of Cosmos, the meaning of human life, the importance of culture for human evolution, and the Great