(Geismar, Maxwell Collection.) | Letters | (Uhnak, Dorothy Collection.) | Letter | (Angoff, Charles Collection.) | Letter. | (Wolfson, Victor Collection.) | Letter. | (Davis, Christopher Collection.) | Letters; notes; postcards, including one to Marc Blitzstein. | (Sandburg, Helga Collection.) | Letters. | (Ferguson, Charles collection.) | Letter. (copy) | (Frost, Robert Collection.) | Letter to Miss Furman, 1916; Letter to Charlotte Rudyard, 1921. | (Gilbert, Edwin Collection.) | Letters; postcard. | (Jacobsen, Josephine Collection.) | Letters | |