St. Helena Sound, South Carolina / Triangulation by C.P. Bolles and C.O. Boutelle, assists. ; topography by John Seib, asst. ; hydrography by the party under the command of Lieut. J.N. Maffitt, U.S.N.
From South Carolina (In 5 layers) Depicts: 1861 Last modified 8 months ago. Unrectified.
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