Frank Spencer. Natural History Museum, 1990. HB, blue cloth with gilt spine, d/j. 170 x 242mm. xxvi + 272 pages, b&w illustrations in text.  Based on the research by Ian Langham (1942-84).  An extensive study of the original documents and other evidence of this famous forgery.  Spine faded, top dusty, pages show signs lof having been kept in damp conditions in the past.