Rarity: Let me explain. I never believed you would send Spitfire away. When we found the rainbow hairs in Spitfire's room, I could tell they didn't fall out. They... were cut! Nopony loses hair in a chunk. And look at the ends. It's a straight line! They were clearly cut with shears, which means somepony planted it! Then when we were examining Spitfire's room, I smelled something on the envelope. Juniper Phoenix, Wind Rider's cologne of choice! Then, in the castle hallway, I noticed some of the damask curtains fell out of their velvet rope-holder, indicating that somepony had been hiding behind them! Perhaps after they dropped off the fake letter?