their common creativity. He called her "She who leads" in his books, and asserted that on many his canvases, two signatures should be written: his own, and Roerich's. "We created together, and not without reason it was said that the works must have two names, women's and men's. Nicholas and Roerich had two children. In August 1902, their eldest son George was born. Later, he became a world-renowned scientist and orientalist. Their younger son, Svetoslav, was born in October 1904. He became a painter. Roerich supported all of her husband's initiatives, and went deeply into all his fields of study. In 1903 and 1904, they traveled together through forty old Russian cities to find sources of national history and culture. During these travels, Roerich had taken expert photographs of churches, architecture monuments, paintings, and ornaments. She also mastered the art of restoration and, together with Nicholas Konstantinovich, recovered some the masterpieces of great artists such as Rubens, Breugel, Van Dyke, and van Orley, that had been hidden by the latest paint layers. She also displayed her artistic intuition by collecting works of art and antiquities. Roerichs collected a beautiful family collection, composed of more than 300 works, which they later had transferred to the Hermitage Museum. Roerich also knew archeology well. Together with her husband, she often left for excavations in the regions of Novgorod's and Tver's, and took part in the work. N. Roerich and their sons thought highly of Roerich, and considered her a spiritual leader and keeper of family's foundations. In 1916, because of a serious lung disease, following the doctor's insistence, the Roerich family moved to Finland (Serdobol), to the seashore of Lake Ladoga. In 1918, Finland declared its independence and closed the Russian border. In 1919, the family moved to England, and made their home in London. Here, in 1920, Roerich, in collaboration with a group of anonymous thinkers and philosophers of the East, which in accordance with Indian's spiritual tradition were named "The Great Teachers" (Mahatmas), began to work for the Living Ethics Teaching (Agni Yoga). Travels In 1920, N. K. Roerich received an invitation to tour the United States with an exhibition of his paintings. Thus, Roerich's family moved to New York City. Here, the cultural activity was organized under N. Roerich's leadership in partnership with Roerich. The culmination of this was the foundation in America of the Nicholas Roerich Museum, the Master-Institute