This paper recounts the use of the information science techniques of subject indexing and annotation in the extensive writings and publications of the philosopher Mortimer J. Adler. A content analysis of Adler's "intellectual autobiography" is described, Adler's efforts as an indexer are reviewed, and some of Adler's thoughts on the practice of indexing are summarized. Adler's preparation and use of annotated bibliographies are also discussed. The relationships between some of the ideas presented in Adler's "How to Read a Book" and certain basic information science concepts and practices are briefly traced. An 8-item reference list and an information science subject index to Adler's "Philosopher at Large: An Intellectual Autobiography" accompany the text. (JL)