Pauli congratulates Thellung on his marriage. He writes about the progress made by Wentzel in the Meissner effect with the help of Bogoljubow's method. He writes about his decision not to publish with Heisenberg. He writes about his own on elementary particles and on indefinite metric.

Pauli writes about his decision not to publish with Heisenberg. He writes about his discussion with Gürsey, and its contacts with Feynman and Gell-Mann. He comments on a recent talk with Delbrück on evolution.

Pauli replies to Touschek's letter of 8 April 1958. He writes about his decision not to publish with Heisenberg. He writes about the present general confusion in quantized field theory.

Heisenberg gives three criteria for the internal consistency of their theory.

Pauli makes another critical remark on Thirring's letter. He writes about the difference between general field operators, and the existence of field equations. He says more about Glaser's letter on indefinite metric.

Pauli writes on his timetable for the next two months. He talks about the manuscript of Heisenberg's lecture on Planck, on Fierz's calculations. If one introduces an indefinite metric (e. g. the Lee-model), one has to expect an integral equation for the field.

Pauli asks a question concerning indefinite metric.

Pauli writes about a paper by Bohr and Mottelson.