LETTER OF TRANSMITTAL 
Department of the Interior, 
United States Geological Survey, 
Washington, I). 6'., March 17, 190 % 
Sir: I have the honor to submit herewith the manuscript and illus- 
trations of a report entitled "The Porcupine Placer District, Alaska," 
by Charles W. Wright, and to recommend its publication as a bulletin. 
The Porcupine placer district lies in southeastern Alaska, adjacent 
to the international boundary, and the exploitation of its mineral 
wealth has, in a measure, been dependent on the definite settlement of 
the line separating Alaska and British Columbia. Now that the 
boundary is established, developments of the placer field will undoubt- 
edly be rapidly extended. The district, though of no great extent, is 
easily accessible and promises to yield a good return if developed by 
economic methods. 
Mr. Wright spent only three weeks in this field, and his studies were, 
therefore, by no means exhaustive. It is believed, however, that this 
presentation of the facts observed and of the tentative conclusions 
reached will be of value to the mine operators and prospectors. 
Very respectfully, 
Alfred H. Brooks, 
Geologist in Charge, 
Division of Alaskan Mineral Resources. 
Hon. Charles D. Walcott, 
Director United States Geological Survey. 
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