Pauli writes of his work with Gürsey. He writes about Glaser's idea to introduce indefinite metric into the Uhlenbeck-Pais's models.

Pauli acknoledges receipt of Krolikowski's paper on elementary particles. He suggests that he could send a copy to Heisenberg.

Pauli makes personal remarks on his relation to physics with increasing age, in contrast to Heisenberg. He writes on his aversion to administrative work and his disappointment over the failure of the younger generation.

About leaving Berkeley (University of California) to Brookhaven National Laboratories, and then going back home. W. Pauli mentions he has heard about biology, also from von Delbruck in Pasadena. Contains a passport photograph (copy) for his travel to USA in 1940 (comment from the hand of Franca Pauli).

Pauli enumerates papers which arrived for the CERN conference. He makes some psychological remarks on Delbrück's attitude to the discussion on evolution.

Pauli will seriously consider sending an invitation to Dr. Dell'Antonio, whom Caldirola recommends.

Pauli talks About his return from California.

Heisenberg sends Pauli his Geneva lecture and notes of the discussion, prepared by Ferretti. He adds a correction of the results for the Pi-eigenvalues, after Schlieder's discovery of a mistake in the calculations.