Pauli talks more about the indefinite metric which Pauli rejects.

Addendum to appendix of last letter, giving Pauli' conclusion. The discussion with Heisenberg has not brought him nearer to a possibility of interpreting physically the formulae derived from the indefinite metric.

Pauli suggests suspending the discussion until new points of view emerge.

Pauli is pleased whith Heisenberg's letter of 24 February and continues the discussion.

Pauli replies to Heisenberg's letter of the 30 October, on $\gamma$-invariance and conservation of electric charge: which group corresponds to this? He talks about mirror-invariance in isotopic spin space.

This is the continuation of the letter of the 16 January 1958. Pauli gives a new idea of indefinite metric.

Pauli acknowledges receipt of Heisenberg's manuscript and makes a few comments.

Pauli writes mainly about books. He recommends C Morgan's "Sparkenbroke" whose religious approach is reminiscent of gnostic ideas.

Pauli writes on philosophical remarks on the essence of the human spirit, on Jung's archetypes and feeling of evidence and on the significance of irrational factors in life.

Pauli writes about the death of H Bradt in New York.