6, 23. 32. 
SMITHSONIAN INSTITUTION 
S. P. LANGLEY, Secretary 
G. BROWN GOODE, Assistant Secretary, 
in charge of U. S. National Museum 
UNITED STATES NATIONAL MUSEUM 
June 1891. 
Sereno VI at son ^ Esq . , 
Herbarium of Harvard University^ 
Cambridge y Massachusetts. 
My dear Mr.' Watson: 
I vjish to acknowledge the receipt 
of your letter of June 17. I should have written 
to you in reply before novj but for the fact that I 
find it necessary to delay still longer the consid- 
eration of your proposition in regard to the dispo- 
sition of the Ball Herbarium. The matter is an ex- 
ceedingly important one, and before taking action 
I wish to consult with others who are at the present 
time absent from Washington. 
T ^ ^ 
In regard to the specimens of Mais de coyote 
from Mexico, I am unable to find any record of them. 
Vie hove received a great many Mexicoji plants from 
