LEAVENWORTH, Elias Warner, lawyer, born in Canaan, New York, 20 December, 1803; died in Syracuse, New York, 25 November, 1887. He was graduated at Yale in 1824, studied law with William C. Bryant, was admitted to the bar in 1827, and practised in Syracuse, New York, until 1850, when he was compelled to retire through ill health. He was mayor of the latter city in 1849, and again in 1859, member of assembly in 1850 and 1857, secretary of state of New York from 1854 till 1855, and president of the board of quarantine commissioners in 1860. In 1861 he became a regent of the State university, and he was appointed by President Lincoln a commissioner under the convention with New Granada. He subsequently filled the offices of president of the board of commissioners to locate the State asylum for the blind, trustee of the State asylum for idiots for over twenty years, and constitutional commissioner. He was elected to the 44th congress, serving frown 6 December, 1875, till 3 March, 1877. From the year 1879 till his death he acted, with Henry R. Pierson, chancellor of the board Of regents, and Chaumcey M. Depew, as a commission to establish and define the boundaries between New York and New Jersey, and between New York and Pennsylvania. Mr. Leavenworth was the author of an elaborate "Genealogy of the Leavenworth Family in the United States" (Syracuse, 1873).