This section is from "The American Cyclopaedia", by George Ripley And Charles A. Dana. Also available from Amazon: The New American Cyclopędia. 16 volumes complete..
Hans Henrik Essex, count, a Swedish general, born in Kaflas, West Gothland, in 1755, died July 28,1824. He was educated in the universities of Sweden, and obtained the favor of Gustavus III. by his attainments and graceful and chivalric bearing. He accompanied him in his travels abroad, and was of great assistance in the campaign of Finland. He attended him to the masked ball where he was murdered by Anckarstroem, Essen having in vain warned him that an attempt was to be made on his life. In 1795, after having accompanied the regent duke of Sodermanland and the young king Gustavus IV. to St. Petersburg, Essen was appointed governor of Stockholm. Subsequently he became governor general of Swedish Pomerania and of Rugen; and in 1807, as commander-in-chief of the Pomeranian army, he distinguished himself by his defence of Stral-sund, and brought about an honorable truce with France. But the king, dissatisfied with Essen, assumed command of the army, and Essen retired from active service until the accession of the duke of Sodermanland as Charles XIII., who created him a count and member of the council, and appointed him ambassador at Paris. In 1814 he marched at the head of the Swedish army against Norway; and when the two countries were united, he became governor of Norway, with the title of Norwegian field marshal and chancellor of the university of Christiania. In 1817 he was made governor general of Scania.
 
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