A score in stone?

At Slate, Chris Wilson begins a series on Scotland’s Rosslyn Chapel, a key locale in Dan Brown’s Holy Grail thriller “The Da Vinci Code” . . .

http://www.slate.com/id/2293858/

. . . focusing on the father-and-son team of Tommy Mitchell, a onetime cryptographer with Britain’s Royal Air Force, and Stuart Mitchell, a composer, who believe that carvings in the 15th-century chapel encode a musical score.

Wilson and the Mitchells don’t name that tune. Not yet, at least. The series runs through May 20.