EXPLANATION OF PLATE XIII 
Upper Figure.—Prince William Sound 
An index map of the sound, showing positions of Port Wells and 
Columbia Bay. Based chiefly on United States Coast Survey chart 
No. 3091. 
Lower Figure.—Sketch of Port Wells 
Surveyed by Henry Gannett, June 26 to 29, 1899. Drawn by Gil¬ 
bert Thompson. Details about Amherst Glacier are in part from the 
map of an expedition under Captains Glenn and Abercrombie, U. S. 
A. ; and use was made also of photographs. 
