Preliminary coast chart ... Florida Reefs [on four sheets] nautical chart

Scale 1:80,000.
LC Civil War Maps (2nd ed.), 117.54-117.58
From its Report of the Superintendent of the Coast Survey, showing the progress of the survey during the year 1863 (Washington, Government Printing Office, 1864). Maps 14-17.
"No. 15" is in the upper left corner of chart no. 69, "no. 16" is in the upper left corner of chart no. 70, "no. 17" is in upper left corner of chart no. 71.
Description derived from published bibliography.
Available also through the Library of Congress web site as raster image.