Rostgaard, Frederick

, a learned Dane, was born Aug. 30, 1671, at Kraagerop, a country seat belonging to his lather, whose heir he became in 1684. Great care was taken of his education by his guardians, and after studying, some time at the university of Copenhagen, it was recommended to him to visit other universities, where eminent professors were to be found. He accordingly set out in 1690, and spt-nt ten years in extending hi* knowledge of the belles lettres, civil law, &c. and had for his masters Morliof, Gr&vius, Gronovius, &c. While at Leyden in 169.'5, he published “Delicise quorundam poetarnm Danorum,” 2 vols. 12mo. He passed a considerable time in England, particularly at Oxford, for the s;>ke of the ms treasures in the Bodleian library, and employed himself much in reading and copying Greek Mss. He afterwards continued the same researches among the libraries of Paris, where he resided for four years, and applied with ardour to the study of the oriental languages. Among the Mss. which he copied in Paris, were the letters of the celebrated sophist Libanius, a good number of which he had also found in England, and communicated these for Wolf’s edition of that author, published at Amsterdam in 1739. Both in France and Italy, which he next visited, he made Jprge purchases of valuable Mss. On his return home in 1700, the king made him counsellor of justice, and keeper of the private archives. In 1710 he was made counsellor of state, and, some years after, justiciary of the supreme tribunal. In 1721 he was appointed first secretary of the Danish chancery, but lost this office in 1725 by the | machinations of some enemies who were jealous of his high favour at court. Being now obliged to leave Copenhagen, he sold his fine library, reserving only a few useful books which might divert his time during his retirement. This library contained about 5000 printed books, and 1068 manuscripts, as appears by the sale catalogue published at Copenhagen in 1726. His disgrace, however, did not last long. Having effectually cleared up his character, the king, Frederick IV. made him, in 1727, baillie of Anderskow, which post he retained until 1730, He then retired to his estate at Kraagerop, and employed his time in study. He was about to put the finishing hand to his “Lexicon Jinguae Danicae,” when he died suddenly April 26, 1745. He was editor of the works of Andrew Bordingius, a much esteemed Danish poet, which were published in 1735, 4to, and had the principal hand in the “Enchiridion studiosi, Arabice conscriptum a Borhaneddino Alzernouchi, &c.” published by Adrian Reland at Utrecht in 1710. He assisted in other learned works, particularly Duker’s Thucydides. 1