I've made this map for my current Ars Magica campain. It focuses on the covenant Collem Leonis as described in the Through the Aegis supplement. Feel free to use, spread and modify to your heart's content if you would find it useful. It's quite big so you might want to download it to see all the details.
It is cool - I think...I can't seem to view or download it in any larger size than shown, so text is blurry is I zoom in. Going to photobucket to find the image only drowned me in ads. I wish I could see it larger and more clearly.