Operation Sea Lion 1941 (The Proposed German Invasion of England), six folding maps of the United Kingdom and four booklets:- two copies of lists of railway stations; fold-out road and town maps; photo book of targets, all contained in their original card folder . Footnote:- the above are part of a set of highly secret documents which were originally prepared for Operation Sea Lion, the German Invasion of England, and then later for German agents and saboteurs who would be dropped by parachute or U-boat to destroy important industrial and communication targets all over England