Papers of Stolberg include correspondence files, notes and manuscripts of his writings, and files of clippings and periodicals in which his articles appeared. His writings deal with the labor movement, economics, the Socialist Party, and other liberal causes of the period between the wars. The extensive correspondence in the collection includes letters from Lewis Corey, Herbert Hoover, Sinclair Lewis, H.L. Mencken, Ayn Rand, Norman Thomas, and Leon Trotsky.

A collection concerned with the various phases of black life in America, containing clippings, pamphlets, photographs, pictures, extracts from periodicals, and a representative group of approximately 350 letters, signatures, manuscripts, and documents. Among the letters are several each from Countee Cullen, Frederick Douglass, Alexander Dumas, fils, William Lloyd Garrison, Claude McKay, Abraham Lincoln, Henry Mencken, William Pickens, Albert A. Smith, and Booker T. Washington. Also, eighteen slavery documents.

Letters written to Mrs. Josephine Sophie White Griffing relating to her interests in the emancipation of African-Americans, temperance, and woman's suffrage. It is evident that the letters have been preserved selectively from Mrs. Griffing's papers, all of them being from well-known contemporaries. Correspondents include Frederick Douglass, Charles Sumner, Horace Greeley, Henry Ward Beecher, Anna Dickinson, Lucretia Mott, William H. Seward, and John Greenleaf Whittier. Many of the letters relate to her efforts to have prominent people give lectures in support of women's suffrage. Also, a scrapbook of clippings about Mrs. Griffing's life and activities and the autograph book of George T. Driggs, a relative, which contains the signatures of prominent political and military figures, particularly members of Congress, during the late 1860s.

A collection concerned with the various phases of black life in America, containing clippings, pamphlets, photographs, pictures, extracts from periodicals, and a representative group of approximately 350 letters, signatures, manuscripts, and documents. Among the letters are several each from Countee Cullen, Frederick Douglass, Alexander Dumas, fils, William Lloyd Garrison, Claude McKay, Abraham Lincoln, Henry Mencken, William Pickens, Albert A. Smith, and Booker T. Washington. Also, eighteen slavery documents.