www.civilwarartillery.com/manufacturers.htm
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J. M. Eason Bros.: Charleston firm operated by James M. and Thomas D. Eason. James M. Eason, proprietor. Soon after the capture of Fort Sumter the Eason firm prepared machinery and began rifling a 24-pounder smoothbore for the State of South Carolina. Subsequently, a portable rifling machine was made which could rifle guns at various distant locations. (The Centennial of Incorporation (Charleston: The News and Courier Book Press, 1884), 235.) The Charleston Mercury of July 20, 1861, reported that "... it has been demonstrated that the Eason gun will throw solid shot or shell, with accuracy, further than any other cannon now in our possession." By September over twenty heavy guns were at the shop awaiting rifling operations. (Columbus Times, September 9, 1861) In November, 1862, Major Childs at the Charleston Arsenal reported "That full three weeks have heretofore been taken by Messrs. Eason & Bro. in rifling and banding 32-pounder and 42-pounder guns; but that by working at night and on Sundays and distributing the work between Eason and Cameron I hope to be able to finish one gun per week. I
should state that it is only lately that Cameron & Co. have procured a lathe large enough to hold a 32-pounder." (O.R., XIV, 690).
General Beauregard, on his own initiative and without Richmond's approval, later had several Columbiads rifled by Eason. This embroiled him in a controversy with the War Department and initially payment on the bill was refused. Rifling of Columbiads had not proven successful in the past but Eason also banded the guns which made them considerably safer. Under growing political pressure, the War Department backed down and the bills were paid. Two 10-inch Columbiads rifled by Eason survive at Charleston."
Cheers,
USS ALASKA