triangulation by C.P. Bolles, A.S. Wadsworth, and D.B. Wainwright ; topography by C.P. Bolles, C.T. Jardella, and D.B. Wainwright ; hydrography by T.A. Jenkins ... [et al.]. Relief shown by hachures; depths shown by soundings and bathymetric shading. "The soundings are expressed in feet and show the depth at mean low water. Depths of 18 feet and less are shown on a dotted surface." "Issued June 1888, F.M. Thorn, Supt." Includes notes and tables for lights, abbreviations, and tides. "No. 424 ... Plate no. 1892"--Top margin.
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