Revised to include March 31, 1936 and re-traced under the direction of C.L. STURDEVANT, Lt. Colonel, Corps of Engineer,  Department of Engineer. The 1936 map is reproduced from a series of 25 A-4 size photocopies I obtained from a well-worn and dog-eared version in the possession of the Corregidor Foundation.  We then stuck the photocopies together and ran it through an architectural photocopier. The original map was comprised of three sheets. Our 1936 map has these three sheets photocopied together as one very large map. The map is over five foot long and 33 inches high and is posted 2nd class airmail, folded.  

The 1936 Map was updated in 1942. We have two of the three individual sheets, which were finally declassified on *. The third sheet is Sheet 3 of the 1936 map. The quality of the reproduction of these two sheets is superior to our 1936 map, because we have a first generation photocopy of the original map as our 'original'.  

A photocopy of the map issued to the 503d PRCT for the 16 February jump;  the original map was produced  doublesided, with a drawn map on one side and an aerial photomap on the other. Reproduced here with both faces on on one side, it now measures 38" x 22". The map sections Corregidor into 1000' squares, and is marked "SECRET", highlighting the strafing lines which could not be crossed until 1030 hrs. Shockingly, though better maps were available, a decision was made to issue this map, clearly inadequate,  for combat use. 

A photocopy of the map prepared in the office of the Department Engineer Harbor Defenses of Manila and Subic Bays, Ft. Mills, "SECRET". Photocopy is a negative of an old blueprint, so now is quite grey.