Mon, 02 Aug 2010 14:22:05 PDT
Just yesterday I repaired a portion of a brick walk that had been 
undermined by the activities of ants -- it had sunk about 3" below its 
surroundings, enough for a stumble.  I had originally underlain the 
brick with landscape fabric, but clearly not enough of it in this spot.
Jim Jones
Lexington, MA

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