steam frigate Merrimac was scuttled and sunk. She was
set on fire and burned to her copper-line, and down
through to her berth deck, which, with her spar and gun decks, was also burned. She was immediately raised, and the powder in her magazine (put up in air-tight copper tanks) was found to be in good condition. It was afterward used by her in her engagements in Hampton Roads.
Steps were immediately taken by the Confederate authorities to convert the Merrimac into an ironclad. As early as May 8, 1861, Mr. Mallory, secretary of the navy, said in a letter to the naval committee: "I regard the possession of an iron-armored ship as a matter of the first necessity. Such a vessel at this time could traverse the entire coast of the United States, prevent all blockades, and encounter with a fair prospect of success their entire navy."
Commander John M. Brooke devised a plan for the con- version of the Merrimac,[1] and the work was immediately commenced under Naval Constructor John L. Porter and Chief Engineer W. P. Williamson, in their respective departments. "The ship was raised, and what had previously been her berth deck became her main gun deck. She was 275 feet long as she then floated, and over the central portion of the hull a house or shield about 160 feet long was built. This shield was of oak and pine wood, two feet thick. The sides and ends inclined, according to Lieut. Catesby Jones, 36 degrees; and the roof, which was flat and perhaps 20 feet wide, was covered with iron gratings, leaving four hatchways. Upon this wooden shield were laid two courses of iron plates, each two inches thick; the first course horizontal, and the second perpendicular, making four inches of iron armor on two feet of wood backing. The iron was put on while
- ↑ Constructor Porter disputed the claim of Commander Brooke to the plan for the conversion of the Merrimac, but President Davis and Secretary Mallory acknowledged Brooke's claim. Moreover, Commander Brooke took out a patent for his invention.
