 Complete the following phrase:  During the 1930s, Markhams artistic career began to gain momentum, regularly winning prizes for her lithographic work. In 1934, Markham organized her first solo exhibition in Ogunquit, Maine, featuring prints, murals and lithographs. Markham created works of social realism depicting street beggars, musicians, actors and scenes from department stores. In recognition of her work, Markham received the prestigious Mary S. Collins Prize at the Philadelphia Print Clubs annual exhibition the following year for her lithograph Elin and Maria 1934. Markham sold work to the Whitney Museum of American Art, the Library of Congress and the Metropolitan Museum of Art. From 1935 to 1937, she worked in the Graphic Arts Division for the Federal Arts Project, a New Deal program designed to provide employment for artists during the Depression. The Hall of Inventions at the 1939 