We mages do more than just waggle our fingers and make pretty sparks! We control magic, the base fabric of our world! And that takes great care, and resolve. And knowledge... so much knowledge!
One of my devices, the mage-tastic gizmonitor, collects and stores that knowledge in huge amounts! But it's lost! When we fled our home of Gnomeregan, I left it in a chest in one of our huts outside the city, and now the place is crawling with leper gnomes!