In a message dated 3/29/2006 4:32:24 PM Eastern Standard Time, [log in to unmask] 
writes:
which, upon contact with water or water vapor, expand, exacerbating the 
exfoliation of the stone, sending shards careening onto the skulls of passersby...
No evidence of shardification or human remains in vicinity.  Indeed all 
mica-infested areas clean and tidy, although it is possible that is devious 
terrorist plot.  Nice delam on 3' x 4" lintel over door, but that isolated piece is 
slathered in "brownstone" paint.   

If you keep exacerbating yourself you'll go blind.       Christopher 

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