This series contains correspondence from Korngold's later life, mainly concerning his literary career. Letters written to his wife, Piri, during their first years together in France, and those written to his cousin, Fella Szper, after World War II, reveal a more personal side. Also included are letters written by Eugene Debs to George and Grace Brewer during the early years of the Socialist Party.

Individual folders contain both incoming and outgoing letters unless otherwise noted.