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born in 1818, an American naval officer, entered the navy at the age of seventeen. The great deed with which his name is principally associated is the battle of the "Monitor" and "Merrimac" in Hampton Roads, March 9, 1862. Warden commanded the" Monitor" with great skill, in an action which must be ranked among the decisive struggles of the war. He received a vote of thanks from Congress and was promoted to be commander. He was engaged in the blockade, destroyed the privateer "Nashville," and took part in the attack on the Charleston forts in 1863. From 1870 to 1874 he was superintendent of the Naval Academy. Warden became commodore in 1868, rear-admiral in 1872, and was retired in 1886.