to the study of language. He carried out extensive research among Amerindian dialects, and also in Pennsylvania Dutch, besides investigations in the English, Chinese, and other languages. Haldeman was an earnest advocate of spelling reform. He was a member of many scientific societies, was the founder and president of the American Philological Association, and one of the early members of the National Academy of Sciences. In 1858, Haldeman was awarded the Trevelyan Prize, given by the Phonetic Society of Great Britain, for his article entitled "Analytic Orthography". He made numerous visits to Europe for purposes of research, and when studying the human voice in Rome determined the vocal repertoire of 40-50 varieties of human speech. n 1869, he returned to the University of Pennsylvania as professor of comparative philology and remained there until his death in 1880. In 1835, Haldeman married Mary A. Hough and the couple had two sons and two daughters. After the wedding, they moved to a new home at the base of Chickies Rock. He had designed the house and laid out the extensive gardens with native specimens of trees and shrubs. Raised a Protestant, Haldeman converted to Catholicism in the 1840s after undertaking a systematic study of different religions. He died suddenly of a heart attack on September 10, 1880 at his home in Chickies, Pennsylvania. Works He was the author of some 150 publications including important works on entomology, conchology, and philology. A monograph of the Limniades and other freshwater univalve shells of North America. Philadelphia, J. Dobson. (1840) A monograph of the freshwater univalve mollusca of the United States, including notices of species in other parts of North America (1842) Zoological Contributions, Parts 1,2,3 (1842–1844) "Enumeration of the Recent Freshwater Mollusk Which are Common to North America and Europe, with Observations on Species and their Distribution" (1844) "Monographie du genre leptoxis" (in Chenu's Illustrations conchologiques, Paris, 1847) "On some Points in Linguistic Ethnology" (in Proceedings of the American Academy, Boston, 1849) "Zoölogy of the Invertebrate Animals" (in the Iconographic Encyclopædia, New York, 1850) Elements of Latin Pronunciation. (1851) "On the Relations of the English and Chinese Languages" (in Proceedings of the American Association for the Advancement of Science, 1856) Analytic Orthography (1860) In 1858, this essay gained Haldeman the Trevelyan Prize in England over 18 European competitors. Tours of a Chess Knight (1864) Pennsylvania Dutch, a Dialect of South German with an Infusion