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Pauli talks about offprints of their common paper.

Pauli asks him to send a copy of his work to Heisenberg. He mentions an error found in Heisenberg's paper.

Pauli talks about a manuscript sent by Heisenberg and a question whether unitarity of S-matrix, commutativity of field-operators and regularity of commutators on the light-cone can be fulfilled in the case of abandoning a positive-definite metric. He writes about Wightman's axioms and their inapplicability to physics.

Pauli asks questions about a paper by Nishijima.

Pauli suggests a note correcting the results of Nishijima. He questions whether Heisenberg's description of physical scattering processes in the Lee model comes to grief through discrete states of negative norm or of complex energy He also asks whether "Heisenberg-models" can be constructed for which the unitarity of the S-matrix is preserved in an indefinite metric of the field-operators?

Pauli discusses the communication problems he has with Springer.

Pauli talks about Schwinger's contribution to the Handbuch.

Pauli talks about the preliminary report which he and Heisenberg have circulated about their joint work. Pauli does not believe anymore in many of the statements in this report. He has written to Heisenberg that the assumption of vacuum degeneration does not seem any more necessary to him. He writes about his talk with Gürsey in Brookhaven. Pauli speaks of his optimism about the solution of the general formal questions which have nothing to do with group theory. He believes that the symmetry violations do not depend on arbitrary terms in the Hamiltonian but on the metric in Hilbert-space.

Pauli talks about the formulation of the present state of their considerations: a spinor model (Lagrange function and vacuum expectation values) cannot have any invariance property from which the vanishing of rest masses can be concluded. From the assumption of exact C-invariance and $\gamma{s}$-invariance this vanishing follows. Therefore they have added terms violating $\gamma{s}$-invariance.