Dr. George Barbour is the man whom Teilhard de Chardin once described as ""my other self,"" and with whom he worked more closely and more continuously than with any other. Dr. Barbour has gathered together in this small volume his memories of his famous friend, beginning with their meeting in 1924 and their collaboration during the famous Chou-Kou-Tien discovery of Peking Man, through their various expeditions in the U.S. and in South America, until the death of Teilhard in 1955. The material is chronologically arranged and includes some of the letters of Teilhard to the author. The book is written without rhetorical artifice, and the correspondence is well integrated with the text. On the whole, the treatment of the great Jesuit is sympathetic without being adulatory; it impresses one as being an objective exposition and appraisal of Teilhard as a man rather than as a scientist or as a priest. One might have hoped for a study in greater depth from Dr. Barbour, but until that is forthcoming this book will serve as an adequate introduction to the understanding of one of the most controversial personalities of our time.