Edmund Bailey O'Callaghan, an American author, born in Mallow, county Cork, Ireland, about 1804. After residing two years in Paris, he went in 1823 to Quebec, where he was admitted to the practice of medicine in 1827. From 1834 to 1837 he edited the "Montreal Vindicator," and in 1836 he was a member of the assembly of Lower Canada. He removed to New York in 1837, received the honorary degree of M. D. from the university of St. Louis, Mo., in 1846, and subsequently that of LL. D. from St. John's college, Fordham. He was keeper of the historical manuscripts in the office of the secretary of state at Albany from 1848 to 1870, when he returned to New York. During his residence in Albany he translated several volumes of the Dutch records in the secretary of state's office. His principal publications are: "History of New Netherland " (2 vols. 8vo, 1845-'8); " Jesuit Relations of Discoveries " (1847); " Documentary History of New York " (4 vols. 4to, 1849-'51); " Documents relating to the Colonial History of New York" (11 vols. 4to, 1855-'61); " Commissary Wilson's Orderly Book" (1857); "Orderly Book of Gen. John Burgoyne" (1860); "Journals of the Legislative Councils of New York " (2 vols.), and "Origin of the Legislative Assemblies of the State of New York " (1861); " A List of the Editions of the Holy Scriptures and parts thereof printed in America previous to 1860" (1861); "The Register of New Netherland, 1626-'74;" "Voyages of the Slavers St. John and Arms," and " Voyage of George Clarke to America" (1867); " Historical Manuscripts relating to the War of the Revolution " (2 vols., 1868); " Laws and Ordinances of New Netherland, 1638-'74 " (1869).