By Thomas Harding
 
Unless you have been asleep, you surely know by now that Dan Brown has released his latest thriller, The Lost Symbol, which follows a professor as he chases a series of Masonic clues around the nation’s capital. The book had a print run of five million copies and has generated intense media interest around the world.
Closer to home, we have our own missing Masonic mystery: How many Masonic aprons were owned by George Washington, and where have they been stored all these many years?
As described in Brown’s book, …