Statistics for occurrence #1 of “Lieutenant-Commander Mitchell” in chapter 36 of Admiral David D. Porter, The Naval History of the Civil War.:

...e opportunity. On the morning of June 4th, an expedition of 400 soldiers embarked at Yorktown on board the United States steamers Commodore Morris (Lieutenant-Commander Gillis), Commodore Jones ( Lieutenant-Commander Mitchell ), the army gun-boat Smith Briggs and the transport Winnissimmet. These vessels proceeded to Walkertown, about twenty miles above West Point, on the Mattapony River. Here the troops were landed...
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