SEYFFARTH, Gustavus, clergyman, born in Ubigau, Saxony, 13 July, 1796; died in New York city, 17 November, 1885. He studied in the gymnasium at Leipsic, afterward in the university, and in 1820 in Paris under the direction of Champollion, the celebrated French Egyptologist. He became well known as a scientist and archaeologist and a decipherer of Egyptian hieroglyphics. In 1823 he published his "Clavis Hieroglyphicum Egyptia-corum." In 1825-'55 he was professor of Oriental archeology in the University of Leipsic, during which time he published the most important of his numerous scientific and archaeological works. In 1855 he emigrated to the United States, and was elected professor of archeology and exegesis in Concordia Lutheran theological seminary, St. Louis, Missouri, where he remained until 1871. From this date until his death he resided in New York in retirement. In 1878 he celebrated the fiftieth anniversary of his doctorate, and he received from the University of Leipsic an annual pension, in recognition of original investigations in archaeology. He claims to have been the first to decipher the hieroglyphics on the celebrated Rosetta stone; and he translated numerous Egyptian manuscripts in the collection of the New York historical society, and the characters on the obelisk in Central park, New York. He published numerous treatises, both in Germany and in the United States, many of which have been translated into different languages. Among his published works are "De Sonis literarum graeeearum turn genuinis turn adoptivis libri duo" (Leipsic, 1823) ; " Rudimenta hieroglyphica, ace. explicationes, xvii. speciminum hieroglyphicum" (1826) ; " Beitrage zur Kenntniss der Literatur, Kunst, Mythologie und Geschiehte des alten Aegyptens" (1826); "Brevis Defensio hieroglyphices inventae a Fr. August Spohn et G. Syfarth" (1827); "Replique aux objections de Mon. Champollion contre le meme systeme" (1827);" Systema Astronomiae AEgyptiaceae" (1833); "Chronologia Sacra: eine Untersuchung tiber das Geburtsjahr Christi" (1846); " Theologische Schriften der alten Aegypter, nach dem Turiner Papyrus, zum ersten Male iibersetzt "(Got, ha, 1855) ; "Grammatica Aegyptiacae: erste Abtheihmg zur Uebersetzung alt-aegyptischen Literatur-Werken, nebst Geschichte des Hieroglyphisches Schlfissels" (1855); "Summary of Recent Discoveries in Biblical Chronology, Universal History, and Biblical Archaeology, with Special Reference to Dr. Abbott's Egyptian Museum, together with a Translation of the First Sacred Books of the Ancient Egyptians" (New York, 1857); "Die wahre Zeitrechnung des alten Testaments, nebst einer Zeittafel zum neuen Testamente" (St. Louis, Missouri, 1858) : "An Astronomical Inscription concerning the Year 22, B. C." (1860); "Amerikanischer Kalendermann" (1869); "Chronologia Veterum " (1871) ; and "Die Allgemeinheit der Sundfluth."