Pauli makes some remarks on Dirac's theory, particularly on the problem of low-frequency photons.

Pauli welcomes Bohr to London. When they learned about the events in Denmark, they were afraid for him and his wife and sons. They were glad to receive good news concerning Bohr and Harald. They do not know anything about the family, but hope that they are also safe in England. Pauli himself feels very well in Princeton and belongs to the few people in the world who can continue their scientific work during the war. He is a bit lonely, but he has a Swiss pupil and is expecting a Chinese student soon. His papers deal with the theory of the meson-field, and the last one is connected with the work of Rosenfeld and Møller. Life is very quiet for Pauli. After the war he will have to make difficult decisions about where he will live then.

Pauli quotes and comments parts of a letter of Eliezer. He also writes about a letter of Heitler whose method leads in the case of meson-fields to different results from those made by Dirac. He mentions two papers by Heisenberg and comments on his unitary S-matrix.

Pauli gives some second thoughts on a discussion, which took place the day before, between Einstein and Pauli on tensors possessing certain symmetry properties.

Pauli writes of another letter of Eliezer and encloses a copy of his answer to him and he adds some remarks.

Pauli criticizes Eliezer's computations. He notes some problems of interpretation. He says that he is sending a copy of this letter to Dirac.

Pauli comments on papers by Wentzel and Fierz published in the Helv. Phys. Acta. He writes about the difficulties of all theories on nuclear forces. He writes about the anisotropy of neutron-proton scattering for higher energies, and its consequences for the theory. He comments on his paper on the Lambda-limiting process. He writes about Dirac's theory of photons with negative energy. He writes about the discovery of a new positive particle.

Pauli invites Born to contribute to an issue of the Rev. of Mod. Phys. in honour of Bohr's 60th birthday.

Pauli just read in the newspapers that the Germans in Denmark have surrendered, and he sends all his good wishes and congratulations on this event. He does not know whether Bohr is still in the USA, but if so, he would like to meet him in Princeton, New York or elsewhere. It is very important for him to make decisions for his future and it would be of invaluable help for him to talk with Bohr. His relations to the Eidgenossische Technische Hochschule in Zürich (ETHZ) are probably more complicated than he thinks.