an aspen grove far up the slope, about a quar- 

 ter of a mile distant from the main house, and 

 perhaps a hundred and twenty feet above it. 

 In this grove I cut three notches in the trunks 

 of several trees to enable me to identify them 

 whether in the garnered pile by a house or 

 along the line of transportation to it. 



-The grounds of this colony occupied several 

 acres on a terraced, moderately steep slope of a 

 mountain moraine. Along one side rushed a 

 swift stream on which the colonists maintained 

 three but little used ponds. On the opposite 

 side were the slope and summit of the moraine. 

 There was a large pond at the bottom, and one 

 or two small ponds, or water-filled basins, dotted 

 each of the five terraces which rose above. The 

 entire grounds were perforated with subter- 

 ranean passageways or tunnels. 



Beaver commonly fill their ponds by dam- 

 ming a brook or a river. But this colony ob- 

 tained most of its water-supply from springs 

 poured forth abundantly on the uppermost ter- 

 race, where the water was led into one pond and 

 a number of basins. Overflowing from these, it 



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