That full-score box set sounds awesome... I'd better start scrounging for money.
This track is, of course, from the part when Pippin goes off with Gandalf to Minas Tirith, leaving Merry behind. We have strings playing a hobbity tune that I think I recall from FotR, and the clarinet plays a sad variant of the Fellowship theme. The music then grows, beginning to introduce the Minas Tirith theme. This is followed by the Rohan theme on French horn, and a closing mainly on strings. (It's a short track, and pretty straightforward.)
As
E&E brought up, the title of the track doesn't really make sense to me. I guess it could correspond with the scene in the EE, in which Merry talks about how he and Pippin used to do everything together. That could be the "memory" and Gandalf taking Pippin away could be the "hope," but it's a stretch.