Statistics for occurrence #1 of “Mr. John Lenthall” in chapter 32 of Admiral David D. Porter, The Naval History of the Civil War.:

... In all that regarded the general increase of the Navy, the Department had made good use of the means at its disposal. The Navy Yards and private establishments were full of work to overflowing. Mr. John Lenthall , a constructor of the highest order, was always ready, with his practical skill and science, for any emergency. He had planned the great frigates, Colorado, Wabash, Minnesota, Merrimac, and Frankli...
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