Depths shown by bathymetric soundings.; "Surveyed in August 1836, under the direction of Lt. Col. S.H. Long, by Lieuts. J.F. Cooper and J.L. Donaldson."; "25 Congress 2 Session S. Doc. Number 73."; Illustration: Profile of Breakwater in 6 fathoms water. on sheet 35 x 44 centimeters Scale not given General Map Collection
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