Da Vinci Code evidence?

(I'd like to apologize in advance to Lewis Perdue...) The Guardian has an article about the art researcher who Dan Brown claims as inspiration for his best-seller. Linked to the article are the infrared images (PDF format) of the art that appears beneath Da Vinci's work:

The Adoration of the Magi could have been dreamed up as a playground for semiologists. Even the visible work is packed with figures, faces, beasts, buildings, foliage and an extraordinary amount of activity, much of which bears no relation to the biblical account of the three kings' visit to the Virgin Mary and her newborn child.

I hereby resolve to make it my duty to link to as many articles about pop-culture that contain the word 'semiologist' as possible.