 The library also has an extensive collection of manuscripts created after 1650, including codices, single-item and small collections, and large collections.The library owns the world's largest collection of Marcel Proust correspondence, as well as the personal papers of H. G. Wells, Carl Sandburg, W.S Merwin, and Gwendolyn Brooks.Several collections pertain to the Spanish Civil War, and the library has a collection of materials created by the Combat Paper Project.