ARNOLD, Lewis G., soldier, born in New Jersey in December 1815; died in South Boston, 22 September 1871. He was graduated at West Point in 1837. He served as second lieutenant in the Florida war of 1837-'38 with the 2d artillery, and as first lieutenant in the same regiment, on the Canada frontier, at Detroit, in 1838-'39. In 1846 he accompanied his regiment to Mexico, and was engaged on the southern line of operations under General Scott, being present at the siege of Vera Cruz, in which he was slightly wounded; in the battles of Cerro Gordo and Amozoque; the capture of San Antonio, and the battle of Churubusco. In the last-named battle he led his company with conspicuous gallantry, and in the storming of the tete de pont was severely wounded. He was brevetted captain 20 August 1847, for gallant conduct at Contreras and Churubuseo, and major, 13 September for gallant conduct at Chapultepec. He served again in Florida in 1856, and commanded a detachment in a conflict with a large force of Seminoles at Big Cypress on 7 April of that year. The breaking out of the war in 1861 found Major Arnold at the Dry Tortugas, whence he was transferred to Fort Pickens on 2 August He remained there until 9 May 1862, being in command after 25 February On 9 October 1861, he aided in repelling the attack of the confederates on Santa Rosa island, and commanded a detachment sent the next morning to pursue them to the mainland. In the successive bombardments of Fort Pickens, which followed in November January and May Major Arnold, as executive officer of the work, distinguished himself by his energy, judgment, and gallantry. In recognition of the value of his services o51 these occasions he was brevetted a Lieutenant-Colonel, to date from 22 November 1861; appointed a Brigadier-General of volunteers, to date from 24 January 1862; and assigned to the command of the department of Florida, with his headquarters first at Fort Pickens and afterward at Pensacola. On 1 October 1862, he was placed in command of the forces at New Orleans and Algiers, Louisiana, which command he retained until 10 November when he was disabled by a stroke of paralysis, from which he never recovered. In February 1864, all hope of his restoration to active life having been abandoned, General Arnold was retired.