New York: Philosophical Library, Inc., 1957. xvi, 183 p. 8vo. 2 maps. 2 ports. 12 plates (incl. facsimiles of letters). Preface by Denzil M. Stanley. Original edition appeared in French in 1955, under the title Stanley: Lettres Inedites. Principal Works Consulted. List of Letters in the Letter Book. Red cloth. Dust jacket has a few small chips and tears in edge.