SIBLEY, George Champlain, explorer, born in Great Barrington, Massachusetts, in April, 1782 ; died in Elma, St. Charles County, Missouri, 31 January, 1863. He was the son of John Sibley, a surgeon in the Revolutionary army, and a daughter of Samuel Hopkins, of Newport, and was brought up in North Carolina. He went to St. Louis, Missouri, during Jefferson's administration as an employe of the Indian bureau, and was subsequently sent among the Indians as an agent of the government. Escorted by a band of Osage warriors, he explored the Grand Saline and Salt mountain, publishing an account of the expedition. After retiring from the Indian department, he was appointed a commissioner to survey a road from Missouri to New Mexico, and made several treaties with Indian tribes. He and his wife, MARY EASTON, were the founders of Lindenwood college, St. Charles, Missouri, giving the land on which it is built. He was interested in the scheme of African colonization and other philanthropic objects.--His nephew, Henry Hopkins, soldier, born in Nachitoches, Louisiana, 25 May, 1816; died in Fredericksburg, Virginia, 23 August, 1886. He was graduated at the United States military academy in 1838, served in the Florida war as 2d lieutenant of dragoons, was promoted 1st lieutenant on 8 March, 1840, took part in the expedition against the Seminoles in the Everglades, and served as adjutant of his regiment till 1846. He was engaged in the military occupation of Texas, was made a captain on 16 February, 1847, and took part in all the principal operations of the Mexican war, gaining the brevet of major for gallantry in the affair at Medelin, near Vera Cruz. He served for several years on the Texas frontier against the Indians, was stationed in Kansas during the antislavery conflict, took part in the Utahexpedition and in the Navajo expedition of 1860, and, while stationed in New Mexico, was promoted major, but resigned on the same day, 13 May, 1861, in order to join the Confederate army. He soon received a commission as brigadier-general, and oil 5 July was assigned to the command of the Department of Mexico, and intrusted with the task of driving there from the National forces. He raised a brigade in northwestern Texas, left Fort Bliss in January, 1862, to effect the conquest of New Mexico, appeared before Fort Craig on 16 February, and on 21 February fought with Colonel Edward R. S. Canby the engagement of Valverde, which resulted in the withdrawal of the National troops. He occupied Albuquerque and Santa Fe, but in April was compelled to evacuate the territory. Subsequently he served with his brigade under General Richard Taylor and General E. Kirby Smith. In December, 1869, he entered the service of the khedive of Egypt with the rank of brigadier-general, and was assigned to the duty of constructing sea-coast and river defences. At the termination of his five years' contract he returned, with broken health, to the United States. He was the inventor of a tent for troops modelled after the wigwams of the Sioux and Comanche Indians. He obtained letters-patent, and the United States government, while he was in its service, contracted for the use of the tent. At the close of the civil war the United States officials refused to carry out the terms of the contract, and after his death the claim was brought before congress in the interest of his family. He occasionally lectured on the condition of the Egyptian fellaheen.