=Du Chaillu= [dü-chä-yü´], =Paul Belloni=. _F._, 1835-1903. A noted French traveller who became a naturalized citizen of the United States. Ivar the Viking; Explorations and Adventures in Equatorial Africa; A Journey to Ashango Land; My Apingi Kingdom; Wild Life under the Equator; Lost in the Jungle; The Country of the Dwarfs; Land of the Midnight Sun; Age of the Vikings; Stories of the Gorilla Country. The greater number of his works are intended for juvenile reading. _Har._ =Duché, Jacob.= _Pa._, 1737-1798. An Episcopal clergyman of Philadelphia who made the prayer at the opening of the Continental Congress. Becoming discouraged at the want of success of the colonists, he urged Washington to abandon the cause. He was thereupon considered an enemy of the country and his property was confiscated. Caspipina’s Letters; Discourses on Various Subjects. =Dudley, Dean.= _Me._, 1823- ----. A Boston lawyer of antiquarian tastes. Pictures of Life in England and America; The Dudley Genealogies; Social and Political Aspects of England and the Continent; History of the First Council of Nice; Officers of the Army and Navy; History of the Dudley Family. =Dudley, Thomas Underwood.= _Va._, 1837-1904. The second Protestant Episcopal bishop of Kentucky. He served in the Confederate army as a colonel, and afterwards entered the ministry. A Wise Discrimination the Church’s Need. =Dudley, William Russell.= _Ct._, 1849- ----. A professor of botany at Cornell University, who has published The Cayuga Flora. =Duer, Edward Louis.= _N. J._, 1836- ----. A physician of Philadelphia. Post Mortem Discoveries; Treatment of Diphtheria. =Duer, John.= _N. Y._, 1782-1858. A once prominent New York jurist whose specialty was insurance law. Duer’s Reports; Laws and Practice of Marine Insurance. =Duer, William Alexander.= _N. Y._, 1780-1858. Brother of J. Duer, _supra_, and like him a prominent jurist. He was president of Columbia College, 1829-42. Constitutional Jurisprudence of the United States. =Duff, Peter.= _N. B._, 1802-1869. An educator of Pittsburg, where he founded Duff’s Mercantile College, one of the earliest institutions of the kind. The North American Accountant was his only publication of note. =Duffel, Mary Gordon.= _Al._, _c._ 1840- ----. A resident of Alabama, who published A History of Alabama; Guide to the Mammoth Cave. =Duffield, George.= _Pa._, 1794-1869. A Presbyterian clergyman, once prominent in Detroit as a leader among New School Presbyterians. Dissertations on the Prophecies; Regeneration; Travels in the Holy Land; Claims of Episcopal Bishops Examined, include his most important writings. =Duffield, George.= _Pa._, 1818-1888. Son of G. Duffield, _supra_. A Presbyterian clergyman of some note as a hymn-writer, one of his most popular hymns being “Stand up for Jesus.”