Googe now has a Print Search feature:
You can search actual books! So when the Society makes an anonymous quote in the literature, you can also search this to see what book it is from.
For instance, search the following (use the quotes too):
"two roads diverged in a yellow wood"
You'll see a list of search results of books where that phrase appears.
Figure many on this list (esp Blondie) would love it.
The new Print Search is still in BETA and many books are not available for search yet, but an early heads-up on the technology never hurts ...
-ithinkisee