This may sound like a really really silly question, but here goes.

I'm trying to transpose Sibelius' Symphony No. 1, Op 39 for Trumpet. It's for an orchestral summer school i am attending in less than two weeks... But I need a bit of closure with the last movement.

The first three movements (1. Andante, ma non troppo 2. Andante, (ma non troppo lento) 3. Scherzo: Allegro) in the part I am transposing for are written for Trumpet in F, but the last movement (4. Finale, quasi una Fantasia) is written in something else, NOT F, but I can't make out clearly what it says at the start of the movement. It appears to be either a C or an E, definately doesn't look like an F.

Can anyone help me out?