Meitner recalls Pauli's neutrino proposal.

Matthews writes about his calculations on the combined interaction of spin-zero mesons, nucleons and electromagnetic field.

Lüders agrees with Pauli about the necessity of including Schwinger's name in the co-authorship of their invariance theorem. He talks about his work with Zumino on TCP-invariance.

Addition to Lüders' letter of 6 Feb, about the authorship of the TPC-theorem.

Lüders makes some comments on Pauli's letter of 18 April 1957 : 1)On the TCP-problem. 2)On Bell's paper. 3)On Klein's theorem. He writes more about his and Zumino's calculations on strong interactions.

Gårding writes on points in his enclosed thesis.