LOL.  Beer will turn them black, too.  Some years back there was an
archeological dig behind an Elizabethan building.  Well, not long
before the dig, a series of black rings was found on the tops of
one of the rafter beams in the building.  Perplexing.

During the dig, a number of ceramic beer mugs were found.  Somebody
thought to measure them against the rings on top of the beams.  A
perfect match.

Carpenters will be carpenters...

Mike in Sacto

> Bob, Ron, I wonder if the black look is a result of soot.