The documents contain detailed maps of different strategic buildings in Eversong Woods. A diagram of an arcane sanctum is also sketched in good detail. There seem to be numerous notes in a language you don't recognize.
As these were carried by a Darnassian spy, it might be a good idea to bring them to the Captain of the Guard - Aeldon Sunbrand.
You've got something for me? Let me take a look.
From what I can understand of this letter, whoever wrote this did not cause the malfunction, but rather was sent here as a spy to observe the results of it. They call our endeavors reckless and dangerous... but who?