The Jens Lindhard Papers include correspondence, mainly from 1975 to 1995, notes, calculations, drafts, newspaper clippings, and many boxes with preprints, reprints, etc. A preliminary review found that most of the material is quite recent and only a little (if anything at all) relates to the period 1945-1965. E.g., there seems to be no correspondence with either Niels or Aage Bohr.