Coast chart no. 68, Florida reefs : from Long Key to Newfound Harbor Key / from a trigonometrical survey under the direction of A.D. Bache, Superintendent of the Survey of the Coast of the United States ; triangulation by J.E. Hilgard, Lieuts. A.H. Seward, J.C. Clark, U.S.A. Assts., J. Rockwell, J.A. Sullivan, Sub-Assts. ; topography by I. Hull Adams, Asst., C.T. Jardella and F.W. Dorr, Sub-Assistants ; hydrography by the parties under the command of Lieuts. Comdg. T.A. Craven, W.G. Temple and J. Wilkinson, U.S.N. Assists. ; issued ... [by] C.P. Patterson, Superintendent ; verified, J.E. Hilgard, Assistant in charge of office ; redd. drng. by E. Hergesheimer, W.T. Martin, and L. Karcher ; engd. by A. Blondeau, A. Petersen, H.S. Barnard, and E.A. Maedel

Relief shown by hachures. Depths shown by bathymetric tints and soundings ; Buoys shown in red, black, and white ; Includes sheet index, text, seal, and tables ; "No. 168" -- upper left margin ; "Plate no. 1100" -- upper center margin ; "Electrotype copy no. 1 by G. Mathiot, U.S.C.S." -- upper right margin ; Map complete in 4 sheets: No. 66 (also no. 166), Florida reefs, from Key Biscayne to Carysfort Reef (1878) -- No. 67 (also no. 167), Florida reefs, from the Elbow to Lower Matecumbe Key (1878) -- No. 68 (also no. 168), Florida reefs, from Long Key to Newfound Harbor Key (1878) -- No. 69 (also no. 169), Florida reefs, from Newfound Harbor to Boca Grande Key (1878) ; "Published in 1863." ; "Issued February 1878." ; "Aids to navigation corrected to 1881." ; "Triangulation executed in 1849, 1856, and 1857; topography executed in 1851, 1857, and 1858; hydrography executed in 1857, 1858, 1859, and 1860."

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