1950. 3rd Edition. 471 pages. No dust jacket. Brown cloth. Black and white illustrated frontispiece. Binding remains firm. Pages have light tanning and foxing throughout. Water staining to some pages, text remains unaffected. Pencil inscriptions to front pastedown and endpaper. Boards have moderate shelf-wear with bumping to corners and rubbing to surfaces. Slight crushing to spine ends. Ring marks to rear board.