DetailsMap of the western coast of Florida with sailing directions to Tampa Bay and Charlotte Harbor and an inset sub-sketch showing the progress of the survey in 1853 north of the St. John's River
"U.S Coast Survey
A.D. Bache Superintendent
Sketch F Showing the Progress of the Survey in Section VI With a General Reconnoissance of the WESTERN COAST OF FLORIDA 1848-53."
This Sketch of the Western Coast of Florida is based on a reconnoisance & observations by F.H. Gerdes Asst, U.S.C.S. on reconnoissance and a sketch by Capt. Casey U.S.A & on the Maps of the Topographical Engineers--The triangulations and reconnoissances on the Florida Keys & vicinity were made by parties on the Coast Survey."