I think my adviser stole my pen.

I can't be sure, but I'm pretty sure that I saw my advisor jotting notes to himself this afternoon using the very pen that mysteriously disappeared from my possession the week before last. That pen really tied my whole note-taking ensemble together. If pressed, I might be forced to admit that it's possible that I just mislaid it. And maybe I just happened to mislay it somewhere that my advisor might just happen to stumble across it. That certainly would be convenient. A little too convenient, I think. More on this story as it develops.