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.

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.