Statistics for occurrence #1 of “Secretary Mallory” in chapter 1.1 of Southern Historical Society Papers, Volume 20.:

...t the weight of iron; and a patent for this claim was duly issued to Lieutenant John M. Brooke, by the Confederate Government, July 29, 1862. It will be observed in the above quotations from Secretary Mallory 's letter that he regards the submerged ends of the ship and the eaves of the casemate as the novel and distinctive feature of the Merrimac. Lieutenant Brooke's patent is based solely on this novel ...
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