Hal,
Were the two stones granite and SANDSTONE? The granite part is easy. The
sandstone is trickier. I saw an outcropping of it behind my back that night
while standing on the site of the Octagon. I'm from Minnesota and we ARE
sandstone, so I thought it was a bit unusual to see this red sedimentary
rock amide the igneous granite all around.

Do I win?

Rick Talbot
In Minnesota
The State Where Nothing is Allowed