Daniel Ammen, Confederate Military History, a library of Confederate States Military History: Volume 7.2, The Atlantic Coast
Clement Anselm Evans, Ed.

[157] casemate 65 feet in length pierced for 6 guns, pivoting as before described in the Atlanta, captured in Wassaw Sound in 1863. She had two high-pressure engines, and was plated on the casemate with six inches of iron. A cigar-shaped steamer 160 feet long, supposed to be of sufficient capacity to carry from two hundred and fifty to three hundred bales of cotton, was also found.

Three torpedo boats fitted for service were found sunk in Cooper River. Two were raised, and one of them put in working order. Their length was 64 feet, diameter 5 1/2 feet, and they had a speed of five knots. Six others were under repairs or being completed, and two ready for service.

Higher up in the Cooper River the rams Chicora, Palmetto, and Charleston, had been destroyed and sunk on the evacuation of the city. The fourth, Columbia, has already been described.¹

After the fall of Charleston, under instructions from the Department, Admiral Dahlgren proceeded to gain information as to the character of the obstructions and defences within Charleston Harbor.

It was asserted by the Secretary of the Navy before the Joint Congressional Committee on the Conduct of the War that the water defences within Charleston harbor had been materially strengthened after the monitor attack of April 7, 1863. This does not seem to be supported by the testimony in Dahlgren's report.

Several persons, whose duties had been to make and plant torpedoes and to make and put down rope obstructions, were examined, and the following facts elicited:

Several months before the spring of 1863 a boom torpedo was placed between battery Bee and Sumter, but it was