tar Flotilla, Gulf of Mexico.
Coast Survey reports.
Treasury Department, May 22, 1862.
Sir — At the instance of the Superintendent of the Coast Survey, I have the honor to transmit herewith a copy of the journal of Assistant F. H. Gerdes, United States Coast Survey, showing the services rendered to the fleet under command of Flag-officer Farragut, United States Navy, and to the mortar fleet under command of Captain D. D. Porter, United States Navy.
I am, very respectfully, S. P. Chase, Secretary of the Treasury. Hon. Gideon Welles. Secretary of the Navy.
Extracts from a report of Assistant F. H. Gerdes, commanding surveying steamer Sachem, to Professor A. D. Bache, Superintendent of the coast Survey.
April 13.--At daylight of the 13th of April, I again got under way and took the lead, the gun-boats of the flotilla and the naval vessels in the vicinity following the Sachem.
The following disposition was made of my party:
1. Sub-Assistant J. G. Oltmann