Statistics for occurrence #1 of “Commander John Downes” in chapter 6 of Daniel Ammen, Confederate Military History, a library of Confederate States Military History: Volume 7.2, The Atlantic Coast:

...Patapsco, Commander Daniel Ammen; the New Ironsides, Commodore Thomas Turner (as flag-ship), followed by the Catskill, Commander George W. Rodgers; the Nantucket, Commander D. M. Fairfax; the Nahant, Commander John Downes , and the Keokuk, Commander A. C. Rhind. The vessels were ordered to pass without returning the fire from batteries on Morris Island; when within easy range of Fort Sumter they were to open upon i...
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