department of the interior 
UNITED STATES GEOLOGICAL SURVEY 
WASHINGTON, D. c., Jan. 2, 1889. 
Mr. Sereno Watson, Harvard, Herbarium, Cambridge, Mass. 
My Dear Sir: 
As I was leaving town on Wednesday last for 
a short absence I provided for the return of the books kindly 
loaned us by you, which I hope reached you in safety. Please ac- 
cept my thanks for seiiding them. 
Mr. Holm of whom I spoke, desires to try his hand at determining 
the Central American plants tliat were sent you a good while ago. 
Can I trouble you to return them? I enclose an official frank, 
a.nd would suggest that registry is probably not necessary. 
Very truly yours 
