These sheet's come from an edition of the Palm Beach Atlas that was a working atlas from a Palm Beach Realtor. There are pencil markings where the atlas was updated by the office with names of owners filled in and prices of properties. Not many copies of the atlas exist and most if not all, are bound, thus it doubtful that individual sheets or pairs such as this case, will ever be offered again!
The 11th picture is from sheet #39, the 12th picture is from sheet #38
Palm Beach Atlas by George Brockway, Civil Engineer