Captured by the U.S. fleet, co-operating with the forces under the command of Major Gen. N. P. Banks. April 20th 1863. Surveyed by J. G. Oltmanns, Sub-asst., U.S. Coast Survey, acting under orders of Major Gen. N. P. Banks. J. W. Maedel. United States Coast Survey. CREATED/PUBLISHED [S.l., 1863] NOTES Scale 1:31,680. Gives vegetation, drainage, houses, fences, road leading from fort, and the position of the U.S. steamers Clifton, Arizona, Calhoun and Estrella, and the Confederate transport Anna and gunboat Marytie.