Sarah Greenough, senior curator and head of the department of photographs, National Gallery of Art. Sarah Greenough talks about her new book on the letters of Georgia O'Keeffe and Alfred Stieglitz, My Faraway One: Selected Letters of Georgia O'Keeffe and Alfred Stieglitz, Volume One, 1915-1933, in this podcast recorded on September 18, 2011, at the National Gallery of Art. Greenough notes the insights provided by the correspondence on their art, their friendships with many key figures of early twentieth-century American art and culture, and, most especially, their relationship with each other.