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

... department. 5. That the novel plan of submerging the ends of the ship and eaves of the casemate is the peculiar and distinctive feature of the Virginia, and was never before adopted. 6. That Mr. Williamson , Lieutenant Brooke, and Mr. Porter reported that the Merrimac could be utilized for this purpose, and recommended the submerged ends and inclined casement for this vessel, which was adopted. Lieu...
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