Pauli sends a holiday travel plan in U.S.

Pauli suggests a meeting in Chicago.

Pauli wants to discuss hyperfine structure in Ann Arbor and will probably bring data from Schüler.

Pauli sends a circular letter concerning Heisenberg's paper on isospin. He explains why he withdrew his participation in Heisenberg's publication.

Pauli discusses Schwinger's paper "A theory of fundamental interaction" published in Annuals of Physics2, 407, 1957 which treats the mirror problem in an alternative way.

Pauli writes on the mirror problem and the group-invariance problem.

Pauli discusses details of Gürsey's idea about the isospin.

Pauli returns briefly to the mirror problem.

Pauli makes further remarks on Gürsey's formulation.