Pauli gives a preliminary answer to Pais' manuscript and letter. He makes some critical comments on Pais' treatment of Born's theory of the electromagnetic field. He makes corrections to his 1943 article on Dirac's theory of negative photons.

Pauli emphasizes the importance of Pais' result for the current density of zero-spin particles. But he expresses concern about the substraction formalism. He writes about his contribution to the Einstein-Festschrift.

Pauli talks about the sign of vacuum polarization. He says that the vacuum polarization charged auxiliary particles must be introduced (positive and negative, zero spin).

Pauli replies to Pais' question about the transformation of Hamiltonians.

Pauli criticises Jung's theory of the closed circle, but in spite of this he thinks that the concept of the Collective Unconscious is correct and plausible. He gives a detailed discussion of this concept and modifications. He makes parallels between micro-physics and psychology of the unconscious which deal with an invisible reality. He writes about Bohr's political activity and the reaction to it.

Pauli talks about the Copenhagen conference and its program.

Pauli writes about personal matters concerning colleagues and their work. He writes about his work on commutation laws in non-local field theories, and about the difficulties regarding the convergence for Lorentz-invariant form-factors.

Pauli writes about the professorship of physics in Geneva.

Pauli reports on progress in understanding a remark disscussed in Leiden.

Pauli makes some remarks about his work on meson-fields.