The stir caused in the civilised world by the writings of Bergson, particularly during the past decade, is evidenced by the volume of the stream of exposition and comment which has flowed and is still flowing. If the French were to be tempted to set up, after the German manner, a Bergson-Archiv they would be in no embarrassment for material, as the Appendix to this book – limited though it wisely is – will show. Mr. Gunn, undaunted by all this, makes a further, useful contribution in his unassuming but workmanlike and well-documented account of the ideas of the distinguished French thinker. It is designed to serve as an introduction to Bergson's philosophy for those who are making their first approach to it, and as such it can be commended.