149 
pleasure a little later of examining the locality in company 
with him and Mr. Warren Upham. In the following year Mr. 
Bouvé published a full account of the potholes," from which 
the greater part of the following deseription is taken, together 
with the illustrations ( Figs. 21 and 22). 
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Fic. 21.— Ротногк, CooPER's ISLAND. 
Cooper’s Island, so-called, is the peninsula consisting of 
granite ledges and salt-marsh which extends into Little Harbor 
from the west side. The eastern end, which reaches nearly to 
the middle of the harbor, is an approximately north-south 
ridge of granite one fourth of a mile long and from 15 to 25 feet 
high. This ridge is divided transversely near the southern 
extremity by a short stretch of grass land ; and it is near the 
1 Proc. B. S. N. H., XXIV, 219-228. 
