Careful... She's watching

Have you ever seen the corners of really old illuminated manuscripts? The vellum in the corner is crisp and deeply discolored- not so much in private worship books but most assuredly on the monks' copies. Wonder what it is?
It is hundreds of years of monk saliva built up and discoloring the document.
The other day our sweet Caitlin decided that licking her fingers was the only way to read a book. For some reason the discolored spots are starting to appear a lot sooner for us than they did for those monks.
Yes, she has always been our little mimic- monkey see and monkey do. I guess this is just another example and another lesson. David now licks his fingers less often while flipping through the newspaper.