A big part of the tour Patty and I took of the Capitol yesterday was the relatively new Visitor Center. There were lots of interesting exhibits on the history of the Capitol and the Senate and House of Representatives that meet there.
One of the exhibits told the story of the laying of the cornerstone of the Capitol by George Washington in a Masonic ceremony. The trowel used was in the exhibit, but where the gavel was displayed was a note that it was "Temporarily removed from the exhibit."
On Monday or Tuesday, I expect I'll be able to report here where the gavel went...