Statistics for occurrence #1 of “Commander J. M. Duncan” in chapter 50 of Admiral David D. Porter, The Naval History of the Civil War.:

...e Chief of the Bureau of Medicine and Surgery. On December 6th, Rear-Admiral Dahlgren had the misfortune to lose the Monitor Weehawken under the following circumstances, as given in the report of Commander J. M. Duncan : On the morning of the 5th I arrived here, and in the evening took command of her [the Weehawken] and went up on the advanced picket, and remained there until 9:30 of the morning of the 6th; the...
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