Two letters (typed, signed) from Albert Einstein, one discussing Sternglass's overemphasis on Kant and the importance of terminology in dictating thought. The second related to the voltage necessary to create a neutron from an electron. Also, some newspaper clippings mentioning Einstein and a copy of a letter from Louis de Broglie to an unknown individual (found amongst the Einstein letters).

Incoming correspondence from fellow philosophers, including forty-seven letters from Richard Burdon, Viscount Haldane, in which he discusses the philosophical systems of Hegel and Kant, comments on Cunningham's studies of Hegel and Henri Bergson, and on the writings of Bergson, Bernard Bosanquet, Francis Herbert Bradley, John Dewey, Albert Einstein, Alfred North Whitehead, and others. Reference is also made to world events.