Letter from W. Pauli to Teubner Verlagsgesellschaft. Related to the republication of "The theory of relativity".

Draft for a letter from W. Pauli to Teubner Verlagsgesellschaft. Related to the republication of "The theory of relativity".

Comments on calculations and observations made by Källèn on Heisenberg's theory of Hilbert-space I and II.

Stapp wrote to request some clarifications on the spinor model (roof operators, degeneracy of the vacuum and isotopic spin dependences).

Heisenberg thanks Pauli for the invitation to the symposium in Zurich.

Pauli makes more remarks about biology. Science can deal only with reproducible events. Historically unique events lie outside the domain of science although they are part of nature.