While thus engaged, Mr. Wheaton had not neglected the literary pursuits to which, in moments of leisure, he always turned with pleasure. He prepared himself by the study of the languages, literature, and history of Northern Europe, for writing a work which was published in London, in 1831, under the title of History of the Northmen. At that period, Scandinavia was a new, and almost untrodden field, but although much has since been added to the information we then possessed respecting its history and antiquities, this work is still considered very valuable by those who take an interest in the subject to which it relates. It was translated into French in 1842, and a new edition of it being desired in this country, Mr. Wheaton undertook the task of preparing it, but did not live to complete it. In the course of these studies he became acquainted with the most distinguished literary characters of Denmark, such as Bask, Rafn, Finn-Magnusen, the poet Ohlenschläger, Münter, Bishop of Zealand, and others. We must not omit to add Madame Frederika Brun, the sister of Münter, and herself a poetess of celebrity, whose splendid mansion in Copenhagen and charming country-seat of Fredericksdal, were for many years the resort of the most distinguished persons in Denmark. It was in 1835 that he bade adieu to the country where nine pleasant years had been passed, and where his amiable disposition, high integrity and talents, had won him many friends. For more than a quarter of a century, our country had no representative in Prussia; but our increased trade with Germany rendering it important that we should renew our relations with that country, he was appointed by President Jackson, Minister Resident to the court of Prussia. On his arrival in Berlin, his new colleagues took pleasure in pointing out to him the house which had been the residence of his predecessor, John Quincy Adams, so long before.