Clarence Irving Lewis - http://search.biography.com/print_record.pl?id=16956 A scholarly treatment of this pragmatist thinker, by Eric Dayton. From the Internet Encyclopedia of Philosophy.
Terry Peterson's Essays - http://search.biography.com/print_record.pl?id=16956 Three essays to facilitate the understanding of C.I. Lewis's thought. Includes a page-by-page annotation of Mind and the World Order.