twelve inches in diameter, straight down 

 from the center of the house about 

 eighteen inches, when it was curved 

 toward the river and opened out in the 

 bottom. Then he dug a second entrance, 

 close to the first one, but this curved 

 toward the slough. The water there 

 being shallow, a ditch or canal dug in 

 the bottom carried the outer end of the 

 burrow down about three feet below 

 the surface and a hundred feet or more 

 out to deep water. The mud procured 

 in digging the entrance and exit was 

 used in plastering the walls of the house. 

 No mud was used on the ventilating 

 flue, which was a space about a foot in 

 diameter in the center of the cone. This 

 was thoroughly protected from outside 

 enemies by two feet in thickness of 

 criss-crossed sticks, but air could freely 

 pass through the interstices. 



The house building proceeded rapidly, 

 much of the work being done at night, 

 but we were able to inspect the building 

 daily, and several times we found the 



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