LETTEE OF TRANSMITTAL. 
Department of the Interior, 
United States Geological Survey, 
Washington, D. C. , February 21, 1900. 
SiR: I have the honor to transmit herewith a detailed report relat- 
ing to the survey of the boundary line between Idaho and Montana 
from the international boundary to the erest of the Bitterroot Moun- 
tains. 
I wish to make acknowledgment of the valuable services rendered 
in this connection by Messrs. S. S. Gannett and D. L. Reaburn, in 
field and office, and by Mr. E. T. Perkins, jr., in the field. Mr. Gan- 
nett prepared the greater portion of the material relating to latitude, 
longitude, base line, azimuth, and triangulation. 
Very respectfully, 
Richard IT. Goode, 
Geographt r. 
Hon. Charles I). Walcott, 
Din dor I T niU d Stati s Geological Survey. 
