Here are two different parts- the melody and also the descant written for an additional instrument. It is not going to be an octave higher like it is written just because the bells don't go up that high. Hopefully it should still sound good with the rest. The melody is the same for the version in the CSB and HB. The descant is only written in the CSB version.
There are a couple new things on the descant part- there is a note with an arrow pointing to a line. This means to let the bell ring longer than usual. There is also a rest note to help keep track of when to play.