Core Sound and Straits, North Carolina.

Scale 1:40,000.
LC Civil War Maps (2nd ed.), 309.7
From its Report of the Superintendent of the Coast Survey, showing the progress of the survey during the year 1864 (Washington, Government Printing Office, 1866). Map 24
At head of title: U.S. Coast Survey, A. D. Bache, Supdt.
"No. 24" is in the upper left corner.
Description derived from published bibliography.
Available also through the Library of Congress web site as raster image.