Letters R through D

Arrived Tuesday afternoon by dragon fire, hastily written and sealed with Celestia's Royal Seal:

Twilight and friends,

I am afraid you must return from your camping trip immediately. Please respond right away, or I will retrieve you personally. Something disturbing has happened that I have not foreseen and I need your help.

Your friend,

Princess Celestia

Arrived Tuesday afternoon by dragon fire, hastily written and unsealed:

Dear Princess Celestia,

We are on our way home. Hasn't Twilight talked to you yet? She left yesterday when you sent the letter for her. I hope everything is okay.
~Spike and Friends