Duyckinck. I. Evert Augustus, an American author, born in New York, Nov. 23, 1816. He is a son of Evert Duyckinck, for many years a leading bookseller and publisher of New York. He graduated at Columbia college in 1835. In 1840 he commenced, with Cornelius Mathews, a monthly periodical entitled "Areturns," which was continued till 1842. In 1847 he commenced the "Literary World," a weekly critical journal; he withdrew from the editorship with the publication of the 12th number, but resumed it on the appearance of the 88th, in connection with his younger brother George; and the periodical remained under their joint management until its discontinuance at the close of 1853. In 1856 the two brothers completed the "Cyclopaedia of American Literature " (2 vols. large 8vo), to which the elder brother added a supplement in 1865. He has also published " The Wit and Wisdom of Sydney Smith," with a memoir (1856); "Poems relating to the American Revolution," with memoirs (1865); "History of the War for the Union" (3 vols., 1861-'5); "National Portrait Gallery of Eminent Americans " (2 vols., 1866); "History of the World from the Earliest Period to the Present Time" (1870); "Memorials of John Allan" (1864); and "Memorials of Francis L. Hawks" (1871). He has also contributed largely to periodical literature.

II. George Long, brother of the preceding, born in New York, Oct. 17, 1823, died there, March 30, 1863. He graduated at the university of New York in 1843. Besides his share in the editorial conduct of the " Literary World " and in the preparation of the " Cyclopaedia of American Literature," he published "George Herbert of Bemerton" (1858), and lives of Bishop Thomas Ken (1859), Jeremy Taylor (I860), and Latimer (1861).