Statistics for occurrence #1 of “Lieut. Catesby” in chapter 12 of Admiral David D. Porter, The Naval History of the Civil War.:

... in the ship before; both boilers and engines were very defective, and the vessel was not capable of making more than five knots an hour. Another able officer, formerly of the United States Navy, Lieut. Catesby ap R. Jones, had charge of the preparation of the Merrimac's armament, and to his skill was due the efficiency of her battery. It consisted of two seven-inch rifles, re-enforced with three-inch ste...
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