Statistics for occurrence #1 of “Confederate States” in chapter 1.1 of Southern Historical Society Papers, Volume 19.:

...ght suppose that Constructor Porter, as deeply concerned as he was in maintaining his claim, would have welcomed the opportunity to establish it. And no other vessel was built that way by the Confederate States . Subsequent vessels were made after the model which Constructor Porter made at Pittsburg in 1847, with the ends above the water and protected like the roof. But the model made after the retur...
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