1. [Lewis, C.I. (Clarence Irving)] Aiken, Henry David.

Definitions, Factual Premises and Ethical Conclusions [Inscribed by Aiken to C.I.Lewis, american philosopher, progenitor of modern modal logic and the founder of conceptual pragmatism].

Philosophical Review, 1952. Octavo. 18 pages (pages 331-348 of the Volume LXI of the Philosophical Review). Original Offprint. Very good+ condition. Signed and inscribed by Henry David Aiken to fellow philosopher C.I.Lewis.

2. [Lewis, C.I. (Clarence Irving)] / [Aiken, Henry David] / Lucius Garvin / Virgin G.Hinshaw.

The Journal of Philosophy, Volume XLVI, No.7: March 31, 1949: Contents: Lucius Garvin – Relativism in Professor Lewis’s [C.I.Lewis] Theory of Esthetic Value / Virgil G.Hinshaw – Basic, Propositions in Lewis’s [C.I.Lewis] Analysis of Knowledge / Book Reviews: Henry Aiken – D.W.Gottschalk, Art and the Social Order and others [Inscribed and signed by Henry David Aiken: “For Lillas – In partial a poor repayment for happiness received – HDA”].

First Edition. [New York], [Columbia University] / The Journal Of University, 1949. Octavo. 59 pages (pages 169-228 of Volume XLVI, No.7: March 31,1949 of The Journal of Philosophy). Original, stapled Softcover Pamphlet. Very good+ condition. Signed and inscribed by Henry David Aiken, including a Book Review by Aiken but mainly including two early contributions on C.I.Lewis’ Philosophy.