UNITED STATES NATIONAL MUSEUM 
BUREAU OF AMERICAN ETHNOLOGY 
ASTROPHYSICAL OBSERVATORY 
NATIONAL ZOOLOGICAL PARK 
ALL CORRESPONDENCE 
SHOULD BE ADDRESSED 
TO THE SECRETARY 
SMITHSONIAN INSTITUTION 
Washington, tZS.A. 
NATIONAL GALLERY OF ART 
NATIONAL COLLECTION OF FINE ARTS 
FREER GALLERY OF ART 
INTERNATIONAL EXCHANGES 
DIVISION OF RADIATION AND 
ORGANISMS 
March 4, 1947 
Dr. A. YIetmore, 
Secretary, 
Smithsonian Institution. 
Dear Dr. Wetmore: 
On or about March 20 , 1947 you will proceed from 
Washington, D. C., to Florida and from there to Panama on 
official vjork for the Smithsonian Institution. 
It is expected that you will visit Barro Coloi’ado 
Island Laboratory in Gatun Lake, known now as the Canal. Zone 
Biological Area for which you are Executive Officer, and that 
following this you will have opportunity to go to the San Josd 
Project to check on observations that you made there three 
years ago. 
Following this you will proceed to points in Darien 
where you will be occupied in making field observations and 
obtain collections of birds and other natural history material 
for the U. S. National Museum. Mr. Watson M. Perrygo of the 
U. S. National Museum is accompanying you as assistant. 
You will be allowed expenses for yourself and for Mr. 
Perrygo including transportation by air wherever required and 
by other means as necessary, actual expenses for subsistence, 
hire of special conveyance if necessary, purchase of specimens, 
material and such other miscellaneous expenditures as may be 
required, payable from the funds of the Smithsonian Institution. 
It is contemplated that this work will cover approxi¬ 
mately two months when you will 
in Washington. 
return to your official station 
Very truly yours, 
Acting Secretary. 
