OTIS, Elwell Stephen, soldier, born in Frederick city, Maryland, 25 March, 1838. He was graduated at the University of Rochester, New York, in 1858, studied law, was admitted to the bar or New York in 1859, and was subsequently graduated at Cambridge law-school in 1861. He entered the volunteer service of the United States as a, captain in the 140th New York infantry on 13 September, 1862, was promoted lieutenant-colonel of that regiment on 23 December, 1863, and made colonel in 1864, participating in all the principal engagements of the Army of the Potomac after Antietam, in the capacity of captain, field-officer, and brigade commander. In 1864 he commanded the regular brigade in the Army of the Potomac, and was severely wounded in the vicinity of Petersburg, Virginia, in consequence of which he was discharged on 24 January, 1865, and brevetted brigadier-general of volunteers. He was appointed lieutenant-colonel of the 22d infantry in the regular army in February, 1867, and colonel of the 20th infantry in February, 1880. From 1867 till 1881 he served on the frontier against the Indians, and then organized the United States infantry and cavalry school in Leavenworth, Kansas, which he conducted until 1885. Since then he has served with his regiment in northwestern Montana, and has also been on duty in Washington, D.C. He is the author of "Tim Indian Question" (New York, 1878).