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Notes:
Title from item.
Text on item: The Bahama Banks and Gulf of Florida, sheet I. Hydrogrphic Office, U.S. Navy. Dec. 1868. From the most recent British & U.S. Surveys. The Bahama Banks and Gulf of Florida, sheet II. Hydrogrphic Office, U.S. Navy. March 1869. The Variation is given for the Epoch 1870.