Statistics for occurrence #1 of “Mr. Mason” in chapter 57, page 796 of The Annals of the Civil War Written by Leading Participants North and South:

...d to board the steamer Trent, now hove-to under our guns. On boarding her, you will demand the papers of the steamer, her clearance from Havana, with the list of passengers and crew. Should Mr. Mason , Mr. Slidell, Mr. Eustis, and Mr. McFarland be on board, you will make them prisoners, and send them on board this ship immediately, and take possession of the Trent as a prize. I do not deem it...
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