LETTER FROM OSWALD HEER. 659 



of that kind, may become known in the United 

 States, and reach such persons as would natu- 

 rally be interested in it. . . . 



With friendly remembrance, yours always, 



Louis Agassiz. 



The answer is some months later in date, 

 but is given here for its connection. 



FROM OSWALD HEER. 



Zurich, December 8, 1868. 



My honored Friekd, — Your letter of last 

 May gave me the greatest pleasure, and I 

 should have answered it earlier had I not 

 heard that you had gone to the Rocky Moun- 

 tains, and supposed, therefore, that my letter 

 would hardly find you at home again before 

 the late autumn. I will delay writing no 

 longer, — the more so because I have received, 

 through the Smithsonian Institution, your 

 great work on the Natural History of the 

 United States. Valuable as it is in itself, it 

 has a double attraction for me as the gift of 

 the author. Accept my warm thanks. It will 

 always be to me a token of your friendly re- 

 gard. It gave me great satisfaction to know 

 that my Fossil Arctic Flora had met with your 

 approval. Since then many new facts have 



