Approaches to Grand Gulf, Miss. From a topographical &amp; hydrographical survey by F. H. Gerdes, Assistant, assigned by A. D. Bache, Supdt, U.S. Coast Survey, to act under orders of Rear Admiral D. D. Porter, U.S. Navy, commanding Mississippi Squadron. Shows "Ft. Cobun," "Ft. Wade," streets of Grand Gulf, "R.R. to Port Gibson," plantation of "Col. Coffee," vegetation, soundings, and relief by hachures. "The fortifications facing the river are those erected by the rebels, and captured by the Mississippi Squadron, under the command of Admiral Porter, on May 3d 1863."
Gerdes, F. H.
<p>Library of Congress Geography and Map Division Washington, D.C. 20540-4650 
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