SAVANNAH, GEORGIA—Marine archaeologists have recovered a second 9,000-pound Dahlgren rifled cannon from the site of the CSS Georgia, an ironclad warship scuttled in the Savannah River in 1864. The cannon had been missed by several high-tech multibeam sonar surveys of the dregs of the river and was an unexpected find. The surveys did reveal the presence of shells for a Dahlgren cannon however, and according to Jim Jobling of Texas A&M University, there was a discrepancy between two manifests from the CSS Georgia. The original listed two Dahlgren cannons, but no Dahlgren cannons were listed on a later manifest, dated October 1864. “I’m very, very pleased,” he said in a press release. The team has also brought leather shoes, wrenches, ceramic bottles, and an anvil to the surface. To read more about maritime archaeology, go to "History's 10 Greatest Wrecks."