Contains correspondence from conference organizers and invited guests, including such notable physicists as Niels Bohr, Alfred Lande, P. A. M. Dirac, Eugene Wigner, and Louis de Broglie. Bohr, Lande, and de Broglie declined the invitation. Correspondence discusses such topics as conference funding, travel arrangements, admission tickets, special events, lecture arrangements, and requests for recordings, transcripts, and publications of conference proceedings. The majority of the correspondence is either written by or directed to Hart as conference manager or Podolsky as chair.