Statistics for occurrence #1 of “Mr. John A. Campbell” in chapter 57 of Admiral David D. Porter, The Naval History of the Civil War.:

...should get on board the Malvern without full identification. The President himself felt a little nervous, and that night a marine kept guard at his state-room door. Next morning, at 10 o'clock, Mr. John A. Campbell , late Associate Justice of the Supreme Court of the United States, sent a request — to be allowed to come on board with General Weitzel, to call on the President. He spent an hour on board, M...
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