Duncan Nathaniel Ingraham, an American naval officer, born in Charleston, S. C, Dec. 6, 1802, died there, June 10, 1863. He entered the navy as midshipman in January, 1812, and became a captain Sept. 14, 1855. While in command of the sloop of war St. Louis in the Mediterranean, in July, 1853, he interfered at Smyrna with the detention by the Austrian consul of Martin Koszta, a Hungarian, who had declared in New York his intention of becoming an American citizen. This affair was elaborately discussed at Washington, between M. Hulsemann, the charge d'affaires of Austria, and Mr. Marcy, secretary of state. The conduct of Capt. Ingraham was fully approved by the government, and congress by joint resolution, Aug. 4, 1854, requested the president to present him with a medal. In March, 1856, he was appointed chief of the bureau of ordnance and hydrography of the navy department. He resigned this post Feb. 4, 1861, and was made chief of ordnance, construction, and repair in the confederate army.