LETTER FROM PROFESSOR MARTIUS. 641 



province of Rio Grande du Sud. This collec- 

 tion would do honor to a professional natural- 

 ist. . . . 



Good-by, dear mother. 



With all my heart, 



Your Louis. 



The following letter from old Professor 

 Martius in Munich, of uncertain date, but prob- 

 ably in answer to one of March, 1866, is inter- 

 esting, as connecting this journey with his 

 own Brazilian expedition almost half a century 

 before. 



FROM PROFESSOR MARTIUS. 



February 26, 1867. 



MY DEAR FRIEND, Your letter of March 

 20th last year was most gratifying to me as a 

 token of your affectionate remembrance. You 

 will easily believe that I followed your journey 

 on the Amazons with the greatest interest, and 

 without any alloy of envy, though your expe- 

 dition was undertaken forty years later than 

 mine, and under circumstances so much more 

 favorable. Bates, who lived for years in that 

 country, has borne me witness that I was not 

 wanting in courage and industry during an 

 exploration which lasted eleven months ; and 

 I therefore believe that you also, in reviewing 



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