6. 18. 22. 
SMITHSONIAN INSTITUTION 
S. P. LANGLEY, Secretary 
UNITED STATES NATIONAL MUSEUM 
<r. HROWN OOODK. Assistant Secretar}-, 
in charge of U. S. National Museum 
QL, 
June 18, /cP 89, 
Professor Sereno Watson 
Botanic Garden 
Cambridge, Mass. 
My dear Sir: 
I am much mortified to find in one of 
the com.ers of my desk a letter from you, unanswered 
which has lain there so long that I think I wont 
refer to it by date — hoping that you did not keep 
a record of the time when you sent it. 
It is not quite a year old, however, and I had 
a reason for delaying at first — which was that 
I hoped that a more definite organization of the 
botanical collections would be soon effected, and 
that then I could reply satisfactorily to your 
questions. It took longer than I had anticipated to 
bring this about. 
