That really is terrible. I feel so bad for you. People that steal stuff are so low. I have had 2 bikes stolen in the last 2 years. And althought it happens to everyone here it's really frustrating. One of the bikes was my mountainbike that I got as a wedding gift from my partner. I really can't get over the fact that people just go and take what isn't theres. Good luck trying to get some compensation on your stolen property, though it won't completely heal the emotional wounds of losing your French horn. Hopefully karma will catch up with the person/people who did this to you.