EHRENBERG AND ROSE. 381 



Itapua some months before the caprieious Dictator could 

 make up his mind to let him go. On the 6th of Decem- 

 ber, 1830, the creatures of Francia again beset him, and 

 demanded of him, for the fourth time, the motives of 

 his former association with the Indians. They insisted 

 upon knowing whether he was a spy of the French or 

 Argentine Governments. Finally on the 2nd of Febru- 

 ary, 1831, they told him that he was free to cross the 

 Parana, and that the Supreme, (not his Maker, but one 

 of his Maker's worst specimens of humanity, Francia), 

 allowed him to go where he would. He hurried towards 

 Brazil, and fixed his residence on the frontier near the 

 little city of San-Borja. There, in a modest cottage, sur- 

 rounded by a large garden of orange trees, he passed the 

 remainder of his life, practising medicine, botanizing, and 

 writing to Humboldt and the savans of Europe. He died 

 last year over eighty years old. 



When Humboldt accepted the offer of the Eussian 

 Government, to explore the mountains of the Ural, he 

 selected two companions for the journey, — Christian 

 Gottfried Ehrenberg, and Gustav Kose. Both these 

 naturalists were young men, one being thirty years old, 

 and the other thirty-three, which was about the age of 

 Bonpland and Humboldt when they started on their 

 great transatlantic journey twenty-nine years before. 

 Eose, who had studied chemistry and mineralogy, was 

 conservator of the collection of minerals in the Uni- 

 versity of Berlin ; and Ehrenberg, whose speciality was 

 the microscope, had travelled with Hemperich through 

 Egypt, Abyssinia, and a great part of Arabia, and had 

 brought back from those countries a magnificent collec- 

 tion of plants and animals, many of which were till 



