834310 32-pounder seacoast gun-barrel, taken from the official U.S. Army?s Instruction for Heavy Artillery manual, 1850-51 (engraving) by American School, (19th century); Private Collection; (add.info.: Combined side, overhead, and cutaway diagram of a U.S. Army Model 1845 or M.1845 32-pounder seacoast gun, a standard weapon used in major garrisons throughout antebellum and Civil War America. Originally engraved for publication as Plate 10 between pages 59-60 of the Instruction for Heavy Artillery manual (Washington, DC: Gideon & Co., Printers, 1851). Original 1851 line-drawing attributed to Lt. Richard H. Rush of the 2nd U.S. Artillery Regiment; original 1851 copper engraving by David McClelland of Washington, D. C.); Battlefields in Motion, Ltd.; American, out of copyright.