Pauli writes of his work with Gürsey. He writes about Glaser's idea to introduce indefinite metric into the Uhlenbeck-Pais's models.

Pauli writes about the eigenvalue problem in formal systems without given Hamiltonian and interchange relations (Vertauschungsrelationen), on which, to his opinion, the future of the spinormodel depends.

Pauli asks questions about the possibility of eliminating the concept of Lagrangian and the corresponding field equations from the formalism of quantized fields. He also writes about corresponding invariants.

Pauli writes about his common work with Heisenberg and the difficulties involved. He talks about a paper by Bogoljubow on supraconductivity of which Wentzel thinks highly.

Pauli comments on Schafroth's preprint. He hopes that with Bogoljubow's and Wentzel's work one can arrive at a possible model for supraconductivity.

Pauli asks a question concerning indefinite metric.

Pauli thinks that classical field theories cannot contribute to a real solution of the problems which Landé has dealt with.

Pauli has heard that Landau is enthusiastic about Heisenberg's and his own attempt to incorporate the isogroup into the spinor model with indefinite metric. He enumerates several difficulties of the theory which are not yet solved.

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.