Pauli writes about Kramer's death and the "shadows" in the last years of his life.

Pauli writes about two problems: The H-theorem and five and higher dimensional field theories.

Photograph of Pauli's grave in Zollikon.

This letter is an addition to the letter of 15 April.

Pauli talks about the integration of Maxwell's equations in Schrödinger's ringcoordinates.

Pauli comments on the treatment of a certain integral. He writes about the structure of a future theory which will describe simultaneously all elementary particles and their masses.

Pauli writes about his essays on Kepler which will be finished shortly.

Pauli advises Klein on improvements to his Bohr-Festschrift article. He reports on receipt of Landan's article. Pauli makes remarks on Soviet contacts with the West.