LUDEWIG, Hermann Ernst, author, born in Dresden, Saxony, 14 October, 1809; died in Brooklyn, New York, 12 December, 1856. He was educated at the universities of Leipsic and Gottingen, studied law, and engaged in its practice, and during his leisure devoted much time to bibliographical studies and to books of travels. He removed to the United States in 1844, and, after spending nearly two years in travel, became naturalized and settled in New York city in the practice of his profession. Previous to his removal to the United States he had published two valuable catalogues of European libraries, "Le Livret des Ana" (Dresden, 1837) and "Zur Bibliothekekonomie" (1840), and in 1846 he contributed to the Leipsic "Serapeum " articles on American libraries and bibliography that were considered as pioneer sketches on these topics. In 1854 he communicated to the Societe de geographie of Paris an article entitled " De l'histoire des aboriges du Mexique," which was printed in the 9th volume of its bulletins. His other works include "Literature of American Local History " (printed privately, New York, 1846) : "Supplement relating to Local History of New York" (1848); and "Literature of American Aboriginal Linguistics," edited by Nicolaus Trfibner, with additions by William W. Turner (London, 1858), which is the first volume of Trfibner's "Bibliotheca-Glottica.'"