designs, pointing out that while the guns generally resemble his designs, these guns used old-style breeching jaws instead of the breech loop found on other Dahlgrens and that there is no elevating screw running through the cascabel . It is also asserted that the guns would have to be elevated by quoins. This is not accurate, particularly for the VIII-inch Dahlgren, as a new iron carriage with an elevating screw beneath the breech of the gun was developed for VIII-inch and other carriages with breech elevating screws were also used . It is also argued that the bores were too small for their late introduction and very few saw service during or after the American Civil War. These guns would most likely have been intended for small riverine and estuarine gunboats, which the navy scrapped as quickly as possible after the war. The documentary evidence also supports a conclusion that these two guns should be considered to be Dahlgen designs. In Mrs. Dahlgren's petition to the national government for compensation for the use of Admiral Dahlgren's inventions, both the 32-pounder gun of 4,500 pounds and VIII-inch shell gun are specifically described as designs of Admiral Dahlgren . Also, in February 1867, Cyrus Alger & Co. paid a royalty on the Dahlgren patent for production of "ten eight-inch guns weighing 64,270, $642.70." There can be little doubt that both of these guns should be credited as Dahlgren designs. IX-inch IX-inch Dahlgren shell gun: 1,185 guns were cast at Alger, Bellona, Fort Pitt, Seyfert, McManus & Co., Tredegar, and West Point foundries between 1855 and 1864. Fort Pitt Foundry also made 16 for the army in 1861. The IX-inch Dahlgren was the most popular and versatile of Dahlgren shell guns made. The IX-inch guns served as broadside armament on larger ships such as , which carried 12 IX-inch Dahlgren guns in broadside mounts in addition to her two pivot guns and which carried 10 IX-inch guns in broadside mounts in addition to her two XI-inch Dahlgren pivot guns. These broadside guns would normally be mounted on a Marsilly carriage (see illustration). Smaller coastal blockade ships such as and mounted IX-inch Dahlgrens on pivot mounts. IX-inch Dahlgrens were used on several river gunboats such as and . If mounted as either a pivot gun or a broadside gun the IX-inch Dahlgren had a crew of 16 and a powderman. X-inch X-inch Dahlgren shell