Edward,

It seems you've been keeping some secrets from me. A certain serial killing little bird told me all about your adventures at the 5th laboratory, and all that you discovered there. How could you not report it to me?

More importantly, the implications of the production of Philosopher's Stones. I never knew…I never could have guessed how the military was producing them for Ishval. What's more, I absolutely would not have thought there were still experiments going on so recently. This is all way above my head (which I find quite irritating).

From what I can glean, it sounds like you're having some trouble discerning who within the military you can trust. I must assure you, I am one of those people. I had nothing to do with this depravity, and now that I have knowledge of it, I will be doing everything in my power to get to the bottom of this conspiracy.

That's what you're trying to do now, right? I'm happy to join you on this quest, though for your safety I may have to keep you a little more in the dark than you would like. I'm sorry in advance, Edward, but when dealing with problems of this magnitude, I'd rather keep you out of the direct line of fire.

Yours,

Roy Mustang

P.S. Regarding the use of souls in creating the Philosopher's Stone…Ed, I'm sorry. Truly. I know you had a lot of hope riding on the Stone, but I also know you would never hurt others to accomplish your mission. You must be despairing now; you'll find another way, though. I know you will.