Correspondence addressed to the editors, Wendell T. Bush and Frederick J.E. Woodbridge, from numerous philosophers including John Dewey, William James, Josiah Royce, and George Santayana. There are two typewritten manuscripts of John Dewey: "The Naturalistic Theory of Perception by the Senses" and "Valuation Judgments and Immediate Quality" both of which contain the author's holograph corrections and emendations. Also, two manuscripts of Ernst Cassirer: "Kant and Rousseau" and "Ficino's Place in Intellectual History."