Typescripts, drafts, printed material, notes, research materials, and handwritten diary entries of many of Casey's literary output, including newspaper articles and essays, columns, nonfiction books, novels, and poetry. Many works are unpublished or are early drafts of what later became works or anthologies. Occasionally, Casey wrote under the pseudonym John Ware.

See also Series 5: Scrapbooks for more printed works, especially from his early writing career.