Preface xv 



indicate the verbal sentiments of Humboldt in addi- 

 tion to those written by him. Of Yarnhagen's letters 

 few only were preserved or could be found. In the 

 little, however, which is known, the noble friendship, 

 the constant, never-ceasing mental activity, the faith- 

 ful fellowship in their mutual efforts in behalf of 

 science and liberty, in all of which Humboldt and 

 Yarnhagen were so many years united, find a suffi- 

 cient expression. 



The letters of many other distinguished and cele- 

 brated persons, which are also added, will show 

 Humboldt in his world-wide connexions, in his mani- 

 fold relations to savans and authors, to statesmen and 

 princes, all of whom approached him with reverenc \ 



LUDMILLA ASSING. 



BERLIN, February, 1860. 



