...he barracks for the privates, mess hall, kitchen, &c. On the southern side are the officers' quarters, which are finished in very handsome style. It is mounted with the heaviest guns of the United States service, arranged in three tiers, the two lower being Casemates and the upper Barbette guns. The Casemate guns are those which are fired from an embrasure in the Scarp Walls, and are protected from...